bluuebunny/crossref_metadata_2025 huggingface dataset:
Perception of individualism and collectivism in Dutch society: A developmental approach
Authors: Oppenheimer Louis
Published: May 2004

Within Triandis’s (1994) theoretical framework, two studies are reported that deal with the developmental course for subjective perceptions of cultural dimensions in Dutch society (i.e., vertical and horizontal individualism and collectivism). While perceptions of society are always subjectively determined, the perceived dimensions that are prevalent in society do not necessarily have to parallel subjective evaluations of the self in terms of the same dimension. In the first study, 245 secondary school pupils and 268 psychology students participated; they were divided into six age groups with mean ages 12, 14, 16, 18, 20, and 22 years and above. Outcomes on the Individualism–Collectivism scale (INDCOL; Singelis et al., 1995) demonstrated age- and gender-related changes in perception of society. By calculating the separate dimensions of individualism, collectivism, verticality, and horizontality, a disappearance of collectivism and verticality and an increase in horizontality across age were observed. In the second study, 226 adolescents divided into five age groups participated (mean ages 12, 13, 14, 15, and 16 years). They were presented with a generalised and personal version of the INDCOL. Again, age- and gender-related differences were observed. Of interest was the presence of a developmental lag between general and personal perceptions of collectivism, with personal perceptions following general perceptions. The increase in personal adherence to horizontality (i.e., equality among people) across age followed and exceeded the general perceptions of horizontality in society.
Children’s attitudes towards an atypical member of an ethnic in-group
Authors: Nesdale Drew , Brown Kristi
Published: May 2004

Given that children have a strong bias towards their in-group, this study examined how children respond to a group member who is revealed to have negative qualities. One hundred and twenty Anglo-Australian children who were 6, 9, or 12 years of age heard a story about an (in-group) Anglo-Australian boy and a (out-group) Chinese boy who were good friends or bad enemies. In addition, the story characters displayed both positive and negative traits, and both enacted a positive and a negative behaviour. The results revealed that, as they increased in age, the children remembered more of the in-group character’s negative versus positive traits, saw themselves as increasingly dissimilar to him, and they liked him less, whereas they remembered more of the out-group character’s positive versus negative traits, saw themselves as increasingly similar to him, and liked him more. Contrary to expectations, the story characters’ relationship did not systematically impact on the children’s responses. The results are discussed in terms of the extent of support provided for social identity development theory.
Young children’s arithmetic strategies in social context: How parents contribute to children’s strategy development while playing games
Authors: Bjorklund David F. , Hubertz Martha J. , Reubens Andrea C.
Published: May 2004

We examined the relationship between parents’ behaviour and children’s use of simple arithmetic strategies while playing a board game in contrast to solving arithmetic problems. In a microgenetic study spanning 3 weeks, 5-year-old children who were just beginning kindergarten played a modified game of “Chutes and Ladders” with one of their parents, computing their moves from the throw of dice. Children also solved math problems (math context) given to them by their parents at the end of each session. Children’s arithmetic strategies and a variety of parental behaviours (prompt, prompt after error, affirmation, disaffirmation, cognitive directives, provide answer) were coded for children’s game moves and the math context. As in past research, children used multiple and variable strategies, both when computing their moves during the game and in solving the math problems. Parents displayed different patterns of behaviours during the game and math contexts and showed different relationships among behaviours and strategies as a function of context, reflecting their sensitivity to the cognitive demands on their children of the different tasks. The results were interpreted in terms of the need to integrate contemporary strategy development theory with a sociocultural perspective and to recognise the dynamic nature of parent–child interactions with respect to the social construction of cognitive strategies.
Development of goal-directed behaviour and related self-processes in toddlers
Authors: Jennings Kay Donahue
Published: May 2004

During toddlerhood the ability to organise actions for accomplishing goals rapidly increases. The developmental changes in actions and self-process that become part of this motivational system have seldom been studied simultaneously. Fifty-seven toddlers between the ages of 15 and 35 months were observed for two sessions while working on mastery tasks. These tasks varied in the degree to which the goal was implicit in the task materials and consequently in how much representation of the goal was necessary to carry out the task. Younger toddlers were just as engaged as older toddlers in tasks with implicit (i.e., proximal) goals but less engaged on tasks with less implicit (i.e., more distal) goals. Older toddlers were more successful in reaching goals (i.e., carrying tasks to completion), and they showed more investment in their own agency (e.g., more pride when goals were reached and more insistence on completing the last step of a task). These broad behavioural changes document the increasing propensity of toddlers to use goals to organise their behaviours and the increasing importance of self-processes in the organisation of action and motivation.
Simian Retrovirus Infections: Potential Confounding Variables in Primate Toxicology Studies
Authors: Lerche Nicholas W. , Osborn Kent G.
Published: May 2004

Various species of nonhuman primates are natural hosts for 6 exogenous retroviruses, including gibbon-ape leukemia virus (GaLV), simian sarcoma virus, simian T-lymphotropic virus (STLV), simian immunodeficiency virus (SIV), simian type D retrovirus (SRV), and simian foamy virus (SFV). These viruses establish persistent infections with a broad spectrum of pathogenic potential, ranging from highly pathogenic to nonpathogenic, depending on various host, virus, and environmental factors. Latent or subclinical infections are common, and various procedures associated with experimental protocols may lead to virus reactivation and disease. Adverse effects on toxicologic research by undetected retroviral infections can occur in several ways, including loss of experimental subjects (and statistical power) due to increased morbidity and mortality. In addition, results may be confounded by virus-induced clinical abnormalities, histologic lesions, alteration of physiologic parameters and responses, and interference with in vitro assays and/or destruction of primary cell cultures. Key clinical and epidemiological features of several important retroviruses are reviewed, with emphasis on viruses infecting species of macaques most commonly used as research subjects in primate toxicology studies. Examples of actual and potential confounding of toxicologic studies by retroviruses are discussed, including altered cytokine profiles in healthy STLV carriers, and clinical and pathological abnormalities induced by SRV infection. Adequate prestudy viral screening is critical to exclude retrovirus-infected primates from toxicologic research protocols and prevent potential confounding of research results.
Good Laboratory Practice Considerations in the Use of Fish Models
Authors: Wolf Jeffrey C. , Wolfe Marilyn J.
Published: May 2004

In the late 1970's, Good Laboratory Practice Regulations (GLP) were instituted by agencies such as the USFDA, the USEPA, and the OECD to provide a system for the monitoring of animal studies submitted in support of the safety of regulated products. Although GLP regulations are regularly employed in laboratory mammal projects, they have been comparatively under-utilized in aquatic animal research. This situation is changing due to the continuing emergence of fish as toxicological and pharmaceutical test subjects, human and animal disease models, genetically-engineered food sources, and environmental sentinels. The application of GLP principles to aquatic animal studies poses a variety of challenges, especially in the areas of Study Protocol design and the creation of Standard Operating Procedures (SOP's). This presentation will highlight differences between mammalian and fish studies in the application of GLP principles, and identify specific concerns associated with the formulation of SOP's for fish projects.
Universities and Territorial Development: Reshaping the Regional Role of UK Universities
Authors: Charles David
Published: May 2004

The regional role of universities is of increasing concern both to the managers of universities and to regional and national policymakers. Changes in the external environment are having a significant effect on the nature of the university and its approach to managing its interactions with external stakeholders, especially at a regional scale. Changes in the conceptualisation of regional development and in regional strategies also place universities more centrally to new policies. In the UK, since the late 1990s, a number of new national initiatives have dramatically increased the support for regional engagement in parallel with the application of regional level policies towards university activities. In consequence survey evidence suggests a growing focus on local and regional communities in university missions, but with a varying degree of identification for specific territorial scales. New institutional arrangements or responses include internal changes within universities such as new regional offices, and more significantly perhaps new collaborative regional arrangements and associations.
The Widening Local and Regional Development Impacts of the Modern Universities — A Tale of Two Cities (and North-South Perspectives)
Authors: Glasson John
Published: May 2004

Universities have widening missions. Increasingly these include explicit roles in local and regional development. This article focuses on such roles for the UK modern universities (formerly known as the new universities, and previously polytechnics). Such universities have taken considerable interest in their local and regional development roles, as exemplified by the case studies of Sunderland University and Oxford Brookes University. The discussion widens from the direct and indirect employment and expenditure impacts, to effects on the local knowledge economy, and towards a wider contribution to sustainable development. This holistic view shows that the modern universities are making major contributions to the local and regional development agendas, with interesting regional variations resulting from their institutional and locational contexts. Such returns merit considerable support.
Towards the Entrepreneurial University
Authors: Lazzeroni Michela , Piccaluga Andrea
Published: May 2004

The article analyses the emergence and evolution of universities towards a more entrepreneurial model. The emergence of such a new entrepreneurial mission, incremental in relation to the more traditional and consolidated ones of education and research, determines the direct involvement of universities in the exploitation of research results, more intense collaborations with industry and involvement in regional economic development. It is argued, nonetheless, that both old and new performance indicators have to be defined in order to monitor both positive and negative consequencies of changes which are taking place in university missions and strategies.
Regional Development Agencies and Cluster Strategies: Engaging the Knowledge-base in the North of England
Authors: Peck Frank , McGuinness David
Published: May 2004

The Government's White Paper on Enterprise, Skills and Innovation (DTI and DfEE, 2001) requires Regional Development Agencies to develop their cluster strategies further, to include partnerships involving higher education. This paper examines these policy intentions in relation to northern England, and incorporates the results of in-depth interviews with policy-makers from RDAs, DTI, DfES and northern Government Offices. Early cluster development has evidently been influenced by existing sector development strategies and the need for inclusivity in regional partnerships. Clusters have been defined broadly, but engagement with universities has required greater focus on specific regional expertise. The authors question the merit of pursuing specialised clusters in isolation at a regional scale; more effective engagement at inter-regional level is suggested for developing effective cluster strategies.
University-Industry Linkages and the Development of Knowledge Clusters in Canada
Authors: Doutriaux Jérôme
Published: May 2004

Research on Systems of Innovation has illustrated the role of local institutions and networks in regional development. This paper looks critically at Canada's 11 most active knowledge clusters and at the impact of university-industry co-operation on their development. It concludes that Canadian universities are more often a catalyst for development than a driver, government laboratories and industry being the primary factors leading to cluster growth and success.
Auditory Negative Priming in Younger and Older Adults
Authors: Buchner Axel , Mayr Susanne
Published: May 2004

Two experiments are reported in which performance of old and young adults in an auditory negative priming task was compared. Auditory negative priming was not smaller in old than in young adults. This result was independent of whether or not conditions were present that had previously been assumed to favour episodic retrieval, as opposed to inhibitory processes, as a basis of the negative priming phenomenon. The data from the present auditory negative priming experiments are incompatible with the global assumption that the efficiency of inhibitory attentional processes in general diminishes across the adult life span.
Inhibition of Return Generated by Voluntary Saccades is Independent of Attentional Momentum
Authors: Machado Liana , Rafal Robert D.
Published: May 2004

Summoning attention to a peripheral location, either by a peripheral cue with the eyes fixed or when a voluntary saccade is made to it and gaze is then returned to the centre, delays detection of subsequent targets at that location compared to a location in the opposite visual field. It has been proposed that oculomotor activation generates this inhibition of return (IOR). This account presupposes that the asymmetry in detection results from inhibition at the cued location rather than facilitation at the uncued location. This has been confirmed for exogenously generated IOR. However, it has not, heretofore, been confirmed for “IOR” generated by voluntary saccades. The current study investigated whether the asymmetry in target detection, elicited either by a peripheral flash or by an eye movement generated in response to a central arrowhead, reflects facilitation at the opposite location due to the path of attentional momentum. Reaction times at the cued location were slower than reaction times at the opposite or perpendicular locations, which did not differ. Opposite facilitation due to attentional momentum requires that opposite be faster than perpendicular, which was not obtained. The results were the same whether IOR was generated by an exogenous cue or by a saccade executed endogenously to a central arrow.
Perception of the Duration of Auditory and Visual Stimuli in Children and Adults
Authors: Droit–Volet Sylvie , Tourret Stéphanie , Wearden John
Published: May 2004

This experiment investigated the effect of modality on temporal discrimination in children aged 5 and 8 years and adults using a bisection task with visual and auditory stimuli ranging from 200 to 800 ms. In the first session, participants were required to compare stimulus durations with standard durations presented in the same modality (within–modality session), and in the second session in different modalities (cross–modal session). Psychophysical functions were orderly in all age groups, with the proportion of long responses (judgement that a duration was more similar to the long than to the short standard) increasing with the stimulus duration, although functions were flatter in the 5–year–olds than in the 8–year–olds and adults. Auditory stimuli were judged to be longer than visual stimuli in all age groups. The statistical results and a theoretical model suggested that this modality effect was due to differences in the pacemaker speed of the internal clock. The 5–year–olds also judged visual stimuli as more variable than auditory ones, indicating that their temporal sensitivity was lower in the visual than in the auditory modality.
I Recognize your Face, but I Can't Remember your Name: A Question of Expertise?
Authors: Abdel Rahman Rasha , Sommer Werner , Olada Ella
Published: May 2004

In four experiments on the identification of familiar faces we reassessed a robust performance pattern—namely, the temporal advantage for retrieving biographical facts as compared to recalling proper names, which has been interpreted as reflecting a serial ordering of the access to semantic and name information. Evidence for recent parallel accounts had been provided by Scanlan and Johnston (1997) who reported an advantage for name retrieval in children. Here we replicated the findings of Scanlan and Johnston but also showed that the naming advantage disappears, and performance is very similar to that of adults when stimuli and tasks are used that are familiar to children. Conversely, we also demonstrated an advantage for name retrieval in adults when highly unfamiliar semantic facts were associated with the faces. Together these findings suggest that there is no fundamental difference in the cognitive architectures of children and adults. The experiments indicate that the relative speed of naming and semantic fact retrieval depends on the expertise with the semantic facts to be retrieved. Implications for models of face identification and naming are discussed.
Notational Modulation of the SNARC and the MARC (Linguistic Markedness of Response Codes) Effect
Authors: Nuerk Hans–Christoph , Iversen Wiebke , Willmes Klaus
Published: May 2004

Number magnitude and number parity representation are fundamental number representations. However, the representation of parity is much less understood than that of magnitude: Therefore, we investigated it by examining the (new) Linguistic Markedness of Response Codes (MARC) effect: Responses are facilitated if stimuli and response codes both have the same (congruent) linguistic markedness (even–right, odd–left) while incongruent conditions (even–left, odd–right) lead to interference. We examined systematically the MARC (for parity) and the Spatial Numerical Association of Response Codes (SNARC; for magnitude) effect for different number notations (positive Arabic, negative Arabic, number words) and with different methods of data analysis. In a parity judgement task, the SNARCeffect indicating a magnitude representation was replicated for all notations except for negative numerals. The MARCeffect was found for number words in all analyses, but less consistently for the other notations. In contrast, a correlational analysis of the reaction time (RT) data, as suggested by Sternberg (1969) using a nonmetric multi–dimensional scaling (MDS) procedure, produced a clear association of parity and response code for all notations (MARCeffect), but little evidence of the SNARCeffect. We discuss the extent to which these notation–specific MARC and SNARC effects constrain current models of number processing and elaborate on the possible functional locus of the MARC effect.
Item and Order Memory for Novel Visual Patterns Assessed by Two–Choice Recognition
Authors: Avons S. E. , Ward Geoff , Melling Lindsay
Published: May 2004

Five experiments examined item and order memory for short lists of novel visual patterns. Memory was tested either by an item recognition test, choosing between a target and a similar foil (Experiments 1, 3a, and 4), or by a relative recency decision between two patterns that occupied adjacent list positions (Experiments 2, 3b, and 5). For both item recognition and relative recency tasks, accuracy was in most cases constant across serial positions, except for a recency advantage that was usually restricted to the most recent item or recency decision. Only a small and marginally significant effect of list length was observed for item recognition. Relative recency was more sensitive to list length and fell to near–chance levels with lists of eight items. We conclude that for these materials, prerecency item recognition depends on stable, context–free descriptions of items. Relative recency judgements are sensitive to list properties, but fail to show evidence of primacy or extended recency that are observed when other techniques are used to study serial order memory. We discuss the results in relation to four current models of serial order memory that embody different assumptions in the way that serial order is represented.
New Arguments in Favour of an Automatic Gender Pronominal Process
Authors: Rigalleau François , Caplan David , Baudiffier Vanessa
Published: May 2004

This paper examines the automatic and strategic use of gender information in pronominal processing. Experiments 1 and 2 used short sentences where a pronoun was preceded by two potential antecedents. Results showed that even when adult readers did not use pronominal gender to strategically accelerate pronominal resolution, they remained sensitive to a gender disagreement between the pronoun and its potential referents. This gender sensitivity was further explored in Experiments 3 and 4. These experiments used longer texts where only one of the two potential referents was highly accessible when the pronoun was encountered. A gender disagreement between the pronoun and this antecedent induced longer reading times. The four experiments confirm the existence of a nonstrategic gender coindexation process between a pronoun and the entity in the focus of a discourse.
Judgement of Two Causal Candidates from Contingency Information: Effects of Relative Prevalence of the Two Causes
Authors: White Peter A.
Published: May 2004

In four experiments participants made judgements about two possible causes of an effect. The prevalence of the causes was manipulated independently of their degree of contingency with the effect. Significant effects of the prevalence manipulation were obtained: In particular, ratings of the unmanipulated candidate tended to decline as the prevalence of the other candidate increased, and there was also a significant but smaller effect on judgements of the latter. These tendencies were independent of the order in which the two candidates were judged. These results were replicated under two stimulus presentation procedures, the instance list procedure (Experiments 1 and 2) and the trial–by–trial procedure (Experiment 3). It was hypothesized that people judge, to some degree, the proportionate strength of the candidates, in other words the proportion of occurrences of the effect in the presence of each, and that the cause prevalence effect is a consequence of this tendency. This hypothesis was supported by the results of Experiment 4: Those participants whose judgements of one candidate were negatively correlated with the frequency of occurrence of the effect in the presence of the other candidate showed a significantly stronger cause prevalence effect than the remainder.
Intermanual Cross–Talk Effects in Unimanual Choice Reactions
Authors: Heuer Herbert , Kleinsorge Thomas , Spijkers Will , Steglich Christoph
Published: May 2004

Intermanual interactions originate at different levels of motor control. Interactions during specification of movement characteristics should affect reaction time for choice between left–hand and right–hand movements. In two experiments combinations of short and long target amplitudes for reversal movements of the left and right hand were cued with variable precueing intervals. Upon presentation of the response signal a unimanual left–hand or right–hand movement had to be produced. Reaction time was faster when same target amplitudes were precued than when different target amplitudes were. At short precueing intervals the longer reaction time with different target amplitudes (early effect) was accompanied by an amplitude assimilation: Short amplitudes were too long, and long amplitudes were too short. At longer precueing intervals the longer reaction time with different target amplitudes (late effect) was accompanied by a higher choice accuracy. These findings are taken to indicate a transient parametric coupling of amplitude specifications, which produces the early and the late effects by way of different mechanisms–namely different degrees of advance specification and generalized de–coupling, which affects the process of choice between hands.
7–11–Year–Old Children Show an Advantage for Matching and Recognizing the Internal Features of Familiar Faces: Evidence against a Developmental Shift
Authors: Bonner Lesley , Burton A. Mike
Published: May 2004

Adults are better at recognizing familiar faces from the internal facial features (eyes, nose, mouth) than from the external facial features (hair, face outline). However, previous research suggests that this “internal advantage” does not appear until relatively late in childhood, and some studies suggest that children rely on external features to recognize all faces, whether familiar or not. We use a matching task to examine face processing in 7–8– and 10–11–year–old children. We use a design in which all face stimuli can be used as familiar items (for participants who are classmates) and unfamiliar items (for participants from a different school). Using this design, we find an internal feature advantage for matching familiar faces, for both groups of children. The same children were then shown the external and internal features of their classmates and were asked to name or otherwise identify them. Again, both age groups identified more of their classmates correctly from the internal than the external features. This is the first time an internal advantage has been reported in this age group. Results suggest that children as young as 7 process faces in the same way as do adults, and that once procedural difficulties are overcome, the standard effects of familiarity are observed.
Changes in the Incidental Context Impacts Search but not Loading of the Motor Buffer
Authors: Magnuson Curt E. , Wright David L. , Verwey Willem B.
Published: May 2004

During a retention test, a change in the nature of the incidental contextual information present during training can have a deleterious impact on response selection by not activating particular subsets of information in memory that help direct the retrieval process. The present experiment addressed whether a change in the incidental context also impacted the completion of processes associated with loading and searching the motor buffer during motor programming. A self–select paradigm was used to describe the planning and execution of one– and four–element sequences that consisted of short and long duration key–presses. During a test phase following training, changes in the incidental contextual information impeded the search of the motor buffer. However, loading specific timing information into the motor buffer was unaffected by shifts in contexts. These data support the contention that contextual information plays a fundamental role in a broad array of movement–planning operations that involve search and retrieval type activity.
What Happens to Information to be Suppressed in Working–Memory Tasks? Short and Long Term Effects
Authors: Carretti Barbara , Cornoldi Cesare , De Beni Rossana , Palladino Paola
Published: May 2004

The study explored, from an individual differences point of view, what happens to information to be suppressed in a working–memory task at short and long term. In particular, it was examined whether control mechanisms of irrelevant information in working memory imply their complete elimination from working memory or just the modulation of their activation. To this end, we compared the fate of irrelevant information in groups of subjects with high and low reading comprehension (Experiments 1 and 2) and subjects with high and low working memory (Experiments 1, 2, 3, and 4). All the experiments presented a working–memory task devised by De Beni, Palladino, Pazzaglia, and Cornoldi (1998), which required participants to process lists of words, to tap when a word from a particular category was presented, and then to recall only the last items in each list. Results confirmed that participants with high reading comprehension also have higher working memory and make less intrusion errors due to irrelevant items that have to be processed but then discarded. Furthermore, it was found that participants with low working memory have slightly better implicit (Experiment 1) and explicit memory (Experiments 3 and 4) of highly activated irrelevant information. Nevertheless, in a long–term recognition test, participants with high and low reading comprehension/working memory presented a similar pattern of memory for different types of irrelevant information (Experiment 2), whereas in a short–term memory recognition test, low–span participants presented a facilitation effect in the time required for the recognition of highly activated irrelevant information (Experiment 4). It was concluded that efficient working–memory performance is related to the temporary reduction of activation of irrelevant information but does not imply its elimination from memory.
Working memory and syllogistic reasoning
Authors: Copeland David , Radvansky Gabriel
Published: May 2004

The purpose of this study was to examine the relation between working memory span and syllogistic reasoning performance. In addition, performance for the reasoning task was compared to predictions made by mental model theory and the probability heuristics model. According to mental model theory, syllogisms that require the use of more mental models are more difficult. According to the probability heuristics model difficulty is related to the number of probabilistic heuristics that must be applied, or (for invalid syllogisms) inconsistencies between the derived and correct conclusion. The predictions of these theories were examined across two experiments. In general, people with larger working memory capacities reasoned better. Also, the responses made by people with larger capacities were more likely to correspond to the predictions made by both mental model theory and the probability heuristics model. Relations between working memory span and performance were also consistent with both theories.
Generation of Hypotheses in Wason's 2–4–6 Task: an Information Theory Approach
Authors: Cherubini Paolo , Castelvecchio Elena , Cherubini Anna Maria
Published: May 2004

We explored the “context of discovery” in Wason's 2–4–6 task, focusing on how the first hypothesis is generated. According to Oaksford and Chater (1994a) people generate hypotheses extracting “common features”, or regularities, from the available triples, but their model does not explain why some regularities contribute to the hypothesis more than do other regularities. Our conjecture is that some regularities contribute to the hypothesis more than do other regularities because people estimate the amount of information in the perceived regularities and try to preserve as much information as possible in their initial hypotheses. Experiment 1, which used two initial triples, showed that the presence of high-information relational regularities in the initial triples affected the information in the initial hypotheses more than did the presence of low-information object regularities. Experiment 2 extended the results to the classic situation in which only one initial triple is given. It also suggested that amount of information is the only aspect of the structure of the triple that affects hypotheses generation. Experiment 3 confirmed the latter finding: Although relations are commonly distinguished between first-order and higher order relations, the latter being most important for generating hypotheses (Gentner, 1983), higher order relations do have an effect on Wason's 2–4–6 task only if their presence increases information. In the conclusion we discuss the statistical soundness of human hypotheses generation processes, and we ask an unanswered question: Amount of information explains why some regularities are preferred to others, but only within a set of “nonarbitrary” regularities; there are object regularities that are rich in information content, but are considered “arbitrary”, and are not used in generating hypotheses. Which formal property can distinguish between these two sets of regularities?
Categorical Reasoning from Multiple Diagrams
Authors: Roberts Maxwell J. , Sykes Elizabeth D. A.
Published: May 2004

Syllogistic reasoning from categorical premise pairs is generally taken to be a multistep process. Quantifiers ( all, no, some, some …not) must be interpreted, representations constructed, and conclusions identified from these. Explanations of performance have been proposed in which errors may occur at any of these stages. The current paper contrasts (a) representation explanations of performance, in which errors occur because not all possible representations are constructed, and/or mistakes are made when doing so (e.g., mental models theory), and (b) conclusion identification explanations, in which errors occur even when information has been correctly and exhaustively represented, due to systematic difficulties that people may have when identifying particular conclusions, or in identifying conclusions in particular circumstances. Three experiments are reported, in which people identified valid conclusions from diagrams analogous to Euler circles, so that the first two stages of reasoning from premise pairs were effectively removed. Despite this, several phenomena associated with reasoning from premise pairs persisted, and it is suggested that whereas representation explanations may account for some of these phenomena, conclusion identification explanations, which have never previously been considered, are required for others.
Sequence Learning: Response Structure and Effector Transfer
Authors: Park Jin-Hoon , Shea Charles H.
Published: May 2004

Two experiments are reported that investigate the response structure and effector transfer of repeated movement sequences. Participants moved a lever to targets sequentially presented on the computer monitor. In Experiment 1 the learning of 10- and 16-element sequences (identical movement pattern) was contrasted. After 1 day of practice the 10-element sequence was organized into fewer subsequences and, thus, performed more rapidly than the 16-element sequence. The imposed organization appeared to be coded in a relatively abstract way, as evidenced by effector transfer that was as good as that on the retention test. In Experiment 2 the 16-element sequence was studied after more extensive practice. By the end of 4 days of practice the participants produced relatively seamless responses void of obvious transitions between subsequences, but the control of the movement was less effector independent than observed earlier in practice. The results suggest that the process of consolidating the sequence, which led to more fluent response production, also resulted in the utilization of effector specific information.
Exploring the Role of Lexical stress in Lexical Recognition
Authors: van Donselaar Wilma , Koster Mariëtte , Cutler Anne
Published: May 2004

Three cross-modal priming experiments examined the role of suprasegmental information in the processing of spoken words. All primes consisted of truncated spoken Dutch words. Recognition of visually presented word targets was facilitated by prior auditory presentation of the first two syllables of the same words as primes, but only if they were appropriately stressed (e.g., OKTOBER preceded by okTO-); inappropriate stress, compatible with another word (e.g., OKTOBER preceded by OCto-, the beginning of octopus), produced inhibition. Monosyllabic fragments (e.g., OC-) also produced facilitation when appropriately stressed; if inappropriately stressed, they produced neither facilitation nor inhibition. The bisyllabic fragments that were compatible with only one word produced facilitation to semantically associated words, but inappropriate stress caused no inhibition of associates. The results are explained within a model of spoken-word recognition involving competition between simultaneously activated phonological representations followed by activation of separate conceptual representations for strongly supported lexical candidates; at the level of the phonological representations, activation is modulated by both segmental and suprasegmental information.
Anxiety-Induced Changes in Movement Behaviour during the Execution of a Complex whole-body task
Authors: Pijpers J. R. (Rob) , Oudejans Raôul R. D. , Bakker Frank C.
Published: May 2004

We investigated the impact of anxiety on movement behaviour during the execution of a complex perceptual-motor task. Masters’ (1992) conscious processing hypothesis suggests that under pressure an inward focus of attention occurs, resulting in more conscious control of the movement execution of well-learned skills. The conscious processes interfere with automatic task execution hereby inducing performance decrements. Recent empirical support for the hypothesis has focused on the effects of pressure on end performance. It has not been tested so far whether the changes in performance are also accompanied by changes in movement execution that would be expected following Masters’ hypothesis. In the current study we tested the effects of anxiety on climbing movements on a climbing wall. Two identical traverses at different heights on a climbing wall provided different anxiety conditions. In line with the conscious processing hypothesis we found that anxiety had a significant effect on participants’ movement behaviour evidenced by increases in climbing time and the number of explorative movements (Experiments 1 and 2) and by longer grasping of the holds and slower movements (Experiment 2). These results provide additional support for the conscious processing hypothesis and insight into the relation between anxiety, performance, and movement behaviour.
Systematic Variation in Performance of an Interceptive Action with Changes in the Temporal Constraints
Authors: Tresilian J. R. , Houseman J. H.
Published: May 2004

People are highly skilled at intercepting moving objects and are capable of remarkably accurate timing. The timing accuracy required depends upon the period of time for which contact with a moving target is possible—the “time window” for successful interception. Studies of performance in an experimental interception task that allows this time window to be manipulated suggest that people change aspects of their performance (movement time, MT, and movement speed) in response to changes in the time window. However, this research did not establish whether the observed changes in performance were the results of a response to the time window per se or of independent responses to the quantities defining the time window (the size and speed of a moving target). Experiment 1 was designed to resolve this issue. The speed and size of the target were both varied, resulting in variations in the time window; MT was the primary dependent measure. Predictions of the hypothesis that people respond directly to changes in the time window were verified. Predictions of the alternative hypothesis that responses to changes in target speed and size are independent of one another were not supported. Experiment 2 examined how the type of performance change observed in Experiment 1 was affected by changing the time available for executing the interception. The time available and the target speed were varied, and MT was again the primary dependent measure. MT was smaller when there was less time available, and the effect of target speed (and hence the time window) on MT was also smaller, becoming undetectable at the shortest available time (0.4 s). The results of the two experiments are interpreted as providing information about the “rule” used to preprogramme movement parameters in anticipatory interceptive actions.
Is Direction Position? Position- and Direction-Based Correspondence Effects in Tasks with Moving Stimuli
Authors: Bosbach Simone , Prinz Wolfgang , Kerzel Dirk
Published: May 2004

Five experiments were carried out to test whether (task-irrelevant) motion information provided by a stimulus changing its position over time would affect manual left–right responses. So far, some studies reported direction-based Simon effects whereas others did not. In Experiment 1a, a reliable direction-based effect occurred, which was not modulated by the response mode—that is, by whether participants responded by pressing one of two keys or more dynamically by moving a stylus in a certain direction. Experiments 1a, 1b, and 2 lend support to the idea that observers use the starting position of target motion as a reference for spatial coding. That is, observers might process object motion as a shift of position relative to the starting position and not as directional information. The dominance of relative position coding could also be shown in Experiment 3, in which relative position was pitted against motion direction by presenting a static and dynamic stimulus at the same time. Additionally, we explored the role of eye movements in stimulus–response compatibility and showed in Experiments 1b and 3a that the execution or preparation of saccadic eye movements—as proposed by an attention-shifting account—is not necessary for a Simon effect to occur.
Task Sets under Reconstruction: Effects of Partially Incorrect Precues
Authors: Kleinsorge Thomas , Gajewski Patrick D. , Heuer Herbert
Published: May 2004

To perform a task that differs from a previously performed one, it is necessary to prepare for the new task as well as to disable the task set of the preceding task. In a series of three experiments we examined whether preparation for a task shift implies a direct update of the task set that is carried over from the preceding trial. To this end, in Experiments 1 and 2 we factorially varied the relation of the task in trial n, first, to the task in trial n − 1 (intertask relation) and, second, to the task that was precued for trial n (precue-to-task relation). Invalid precues resulted in substantial costs, which increased with longer precueing intervals. However, this increasing effect of the precue-to-task relation was not accompanied by a decreasing effect of the intertask relation. Furthermore, both effects had different qualitative properties. These findings suggest that two tasks can be represented concurrently but on two different levels of representation. In Experiment 3 we observed that the persistence of the effect of the intertask relation depends on the possibility that task repetitions can occur in trials in which a task shift is precued. This suggests that the persistence of the effect of the intertask relation is controlled in a context-sensitive way.
CS-Dependent Response Probability in an Auditory Masked-Detection Task: Considerations based on Models of Pavlovian Conditioning
Authors: Mason Christine R. , Idrobo Fabio , Early Susan J. , Abibi Ayome , Zheng Ling , Harrison J. Michael , Carney Laurel H.
Published: May 2004

Experimental studies were performed using a Pavlovian-conditioned eyeblink response to measure detection of a variable-sound-level tone (T) in a fixed-sound-level masking noise (N) in rabbits. Results showed an increase in the asymptotic probability of conditioned responses (CRs) to the reinforced TN trials and a decrease in the asymptotic rate of eyeblink responses to the non-reinforced N presentations as a function of the sound level of the T. These observations are consistent with expected behaviour in an auditory masked detection task, but they are not consistent with predictions from a traditional application of the Rescorla-Wagner or Pearce models of associative learning. To implement these models, one typically considers only the actual stimuli and reinforcement on each trial. We found that by considering perceptual interactions and concepts from signal detection theory, these models could predict the CS dependence on the sound level of the T. In these alternative implementations, the animal's response probabilities were used as a guide in making assumptions about the “effective stimuli”.
Elemental and Configural Encoding of the Conditioned Stimulus
Authors: Rescorla Robert A.
Published: May 2004

Five experiments explored the effect of conditioning AB and CD compounds on responding to transfer AD and BC compounds and to elements. These experiments used several conditioning procedures: flavour aversion and instrumental discriminative learning in rats and autoshaping in pigeons. All of the experiments found greater responding to the trained AB and CD than to the transfer AD and BC compounds, a result that agrees with some configural models, but not with an elemental model. All experiments also found greater responding to the transfer AD and BC compounds than to the elements, a result that agrees with elemental, but not configural, models.
NMDA Receptor Activity and the Transmission of Sensory Input into Motor Output in Introverts and Extraverts
Authors: Rammsayer Thomas H.
Published: May 2004

Recent research suggests that individual differences in brain dopamine functioning may be related to the personality dimension of extraversion. The major goal of the present study was to answer the question of whether a pharmacologically induced change in glutamatergic NMDA receptor activity would also differentially affect the transmission of sensory input into motor out-put in introverts and extraverts. Therefore, in a double-blind within-subjects design, either 30 mg of the NMDA receptor antagonist memantine or placebo were administered to 48 healthy male volunteers before performing a choice reaction-time task. In introverts, memantine caused a pronounced increase in lift-off time (i.e., the time required to lift the finger from a home button) compared to that in extraverts, whereas movement time (i.e., the time required to move the finger from the home button to a response button) was decreased in both groups. The pattern of results suggests that extraversion-related differential sensitivity to pharmacologically induced changes in NMDA receptor activity is limited to functions that involve an interaction between the glutamatergic and dopaminergic systems.
Latent Inhibition of US Signal Value
Authors: Goddard Murray J.
Published: May 2004

Three experiments with rats examined the effects of preexposure to an unconditioned stimulus (US; a single food pellet) on the subsequent ability of that US to effectively signal the delivery of three food pellets during a US-US conditioning procedure. In Experiment 1, latent inhibition (LI) rats showed attenuated conditioning, compared to control (C) rats, when a single food pellet, delivered 10 minutes into a session, was followed by three additional pellets. In preexposure, one pellet had been delivered 10 minutes into each session (in group LI), or placed into the magazine at the beginning of each session (in group C). Experiment 2 showed that this effect was evident when the conditions of preexposure matched those of conditioning for group C, and Experiment 3 showed that the difference between groups LI and C was not a product of context conditioning, or latent inhibition to the noise of the feeder in group LI. Implications of these results for theories of latent inhibition are considered.