bluuebunny/crossref_metadata_2025 huggingface dataset:
Cost-Effectiveness of Community Interventions for Colorectal Cancer Screening: Low-Income Hispanic Population
Authors: Lairson David R. , Kim Junghyun , Byrd Theresa , Salaiz Rebekah , Shokar Navkiran K.
Published: January 2018

Objective: To assess the cost-effectiveness of interventions to increase colorectal cancer (CRC) screening among low-income uninsured Hispanics in El Paso, Texas. Method: Participants 50 to 75 years old who were due for screening, were uninsured, and had a Texas address were randomized to promotora, video, or promotora and video interventions. High-risk participants were offered colonoscopy, while others were offered fecal immunochemical testing. A nonintervention comparison group was recruited from a similar Texas U.S.–Mexico border county. Screening was determined at 6 months postintervention. Resources were tracked prospectively to determine cost. Incremental cost-effectiveness ratios were assessed with “intention to treat” methods. Uncertainty in the estimates was analyzed with sensitivity analysis and nonparametric bootstrap methods. Results: The interventions achieved screening rates of between 75% and 87% compared to 10% in the comparison group. The cost per participant ranged from $72 for group sessions to $93 for individual video sessions with video and promotora. The group video sessions cost $104 per additional person screened. Conclusion: The CRC screening interventions were effective for increasing CRC screening. Compared to the experience in the control county, the group-based video-only intervention was the most cost-effective CRC screening promotion intervention.
The Implementation of Parent–Child Interaction Therapy for the Treatment of Tourette Syndrome and Disruptive Behavior
Authors: Monahan Maureen , Agazzi Heather , Jordan-Arthur Brittany
Published: January 2018

A diagnosis of Tourette syndrome (TS) can confer a plethora of negative outcomes including impaired psychosocial functioning, academic difficulties, disruptive behavior, and mood dysregulation. Further, children diagnosed with TS can engender immense amounts of burden and stress experienced by their caregivers which can put strain and tension on the parent–child relationship. Uncovering efficacious treatments for improving the quality of life for children diagnosed with TS and their families represents both a great challenge as well as a chief concern for professionals working with this population. The present case study describes the provision of parent–child interaction therapy for addressing behavioral problems in a 5-year-old boy diagnosed with TS. Results suggest improvements in child compliance, decreases in disruptive behaviors, and decreases in certain symptomatology associated with TS. Treatment implications for working with youth with TS are described in detail.
Professor Samuel David Gross (1805-1884) and His Innovations in Surgery and Medicine
Authors: Laios Konstantinos
Published: January 2018

Professor Samuel David Gross (1805-1884) is considered as one of the founders of American surgery. He was a skillful surgeon who could excellently perform a lithotomy, an amputation, and a cataract surgery. He introduced many new surgical techniques and designed new surgical and medical instruments. He expertise was not limited to surgery alone; he also published studies concerning internal medicine, pathology, experimental physiology, and pharmacology. His most important treatise was his 2-volume work, A System of Surgery, Pathological, Diagnostic, Therapeutic and Operative (1861), which was a standard reference book in surgery in the United States during the second half of 19th century. Gross received many honors during his life. He was active in the operating room until his death.
Free Speech from Left to Right: Exploring how Liberals and Conservatives Conceptualize Speech Rights through the Works of Lenny Bruce and Milo Yiannopoulos
Authors: Mello Joseph
Published: January 2018

This article examines how liberals and conservatives conceptualize free speech by analyzing the works of Lenny Bruce and Milo Yiannopoulos. I find that conservatives and liberals have very different conceptions of what a legitimate citizen is, and this shapes their support for free speech claims. Liberals see rights as a mechanism for protecting minority groups; as such, they support speech claims when they are advanced by dissidents challenging entrenched hierarchies. In contrast, conservatives see law as beholden to the will of the majority; thus, they support speech claims when they are seen as challenging the power of subversive elites.
Navigating research ethics in the absence of an ethics review board: The importance of space for sharing
Authors: Giraud Cécile , Cioffo Giuseppe Davide , Kervyn de Lettenhove Maïté , Ramirez Chaves Carlos
Published: January 2018

Ethics review committees have become a common institution in English-speaking research communities, and are now increasingly being adopted in a variety of research environments. In light of existing debates on the aptness of ethics review boards for assessing research work in the social sciences, this article investigates the ways in which researchers navigate issues of research ethics in the absence of a formal review procedure or of an ethics review board. Through the analysis of qualitative and quantitative data, the article questions the overall utility of ethics review boards. Highlighting the importance of space for sharing, the authors argue for the development of a new type of structure that takes into account researchers’ ‘ethos of responsibility’ as an adequate ethical compass for research in the social sciences.
Ethics review and freedom of information requests in qualitative research
Authors: Walby Kevin , Luscombe Alex
Published: January 2018

Freedom of information (FOI) requests are increasingly used in sociology, criminology and other social science disciplines to examine government practices and processes. University ethical review boards (ERBs) in Canada have not typically subjected researchers’ FOI requests to independent review, although this may be changing in the United Kingdom and Australia, reflective of what Haggerty calls ‘ethics creep’. Here we present four arguments for why FOI requests in the social sciences should not be subject to formal ethical review by ERBs. These four arguments are: existing, rigorous bureaucratic vetting; double jeopardy; infringement of citizenship rights; and unsuitable ethics paradigm. In the discussion, we reflect on the implications of our analysis for literature on ethical review and qualitative research, and for literature on FOI and government transparency.
‘Google wants to know your location’: The ethical challenges of fieldwork in the digital age
Authors: van Baalen Sebastian
Published: January 2018

Information communications technologies (ICTs) like laptops, smartphones and portable storage devices facilitate travel, communication and documentation for researchers who conduct fieldwork. But despite increasing awareness about the ethical complications associated with using ICTs among journalists and humanitarians, there are few reflections on digital security among researchers. This article seeks to raise awareness of this important question by outlining three sets of ethical challenges related to digital security that may arise during the course of field research. These ethical challenges relate to (i) informed consent and confidentiality, (ii) collecting, transferring and storing sensitive data, and (iii) maintaining the personal security and integrity of the researcher. To help academics reflect on and mitigate these risks, the article underscores the importance of digital risk assessments and develops ten basic guidelines for field research in the digital age.
Implicit false belief tracking is preserved in late adulthood
Authors: Grainger Sarah A , Henry Julie D , Naughtin Claire K , Comino Marita S , Dux Paul E
Published: January 2018

It is now well established that relative to their younger counterparts, older adults experience difficulties on tasks that require the conscious and explicit processing of others’ mental states (e.g., beliefs, intentions; theory of mind [ToM]). Despite the importance of relatively automatic and unconscious mental state attribution processes in everyday life, no study to date has tested whether tasks that require the implicit processing of others’ belief states also show age-related changes. In this study, younger and older adults completed an implicit false belief task, in which their eye movement patterns were monitored while they passively viewed true and false belief movies. In addition, they were assessed on measures of explicit ToM processing. While older adults showed impairments in explicit ToM processing relative to younger adults, both age groups demonstrated a similar capacity for implicit false belief processing. These findings suggest that implicit components of ToM are preserved in late adulthood and are consistent with dual process models of ageing that emphasise age-related stability in automatic processing and declines in more controlled and effortful cognitive operations. We discuss the potential implications of these findings for social interactions in old age.
Memory for melodies in unfamiliar tuning systems: Investigating effects of recency and number of intervening items
Authors: Herff Steffen A , Olsen Kirk N , Dean Roger T , Prince Jon
Published: January 2018

In a continuous recognition paradigm, most stimuli elicit superior recognition performance when the item to be recognized is the most recent stimulus (a recency-in-memory effect). Furthermore, increasing the number of intervening items cumulatively disrupts memory in most domains. Memory for melodies composed in familiar tuning systems also shows superior recognition for the most recent melody, but no disruptive effects from the number of intervening melodies. A possible explanation has been offered in a novel regenerative multiple representations (RMR) conjecture. The RMR assumes that prior knowledge informs perception and perception influences memory representations. It postulates that melodies are perceived, thus also represented, simultaneously as integrated entities and also as their components (such as pitches, pitch intervals, short phrases and rhythm). Multiple representations of the melody components and melody as a whole can restore one another, thus providing resilience against disruptive effects from intervening items. The conjecture predicts that melodies in an unfamiliar tuning system are not perceived as integrated melodies and should (a) disrupt recency-in-memory advantages and (b) facilitate disruptive effects from the number of intervening items. We test these two predictions in three experiments. Experiments 1 and 2 show that no recency-in-memory effects emerge for melodies in an unfamiliar tuning system. In Experiment 3, disruptive effects occurred as the number of intervening items and unfamiliarity of the stimuli increased. Overall, results are coherent with the predictions of the RMR conjecture. Further investigation of the conjecture’s predictions may lead to greater understanding of the fundamental relationships between memory, perception and behavior.
Development of basic intuitions about physical support during early childhood: Evidence from a novel eye-tracking paradigm
Authors: Krist Horst , Atlas Caroline , Fischer Henrike , Wiese Claudia
Published: January 2018

Using a novel eye-tracking paradigm, we assessed the development of 2- to 6-year-old children’s intuitions about the physical support of symmetrical and asymmetrical objects in two experiments (Experiment 1: N = 98; Experiment 2: N = 288). Children were presented with video sequences demonstrating how two identical blocks were lowered onto a platform before being released simultaneously. In the critical test trials, both blocks remained in place although only one of them was sufficiently supported. As expected, children tended to look longer at the block, which should have fallen. Taken together, the results indicate that even 2-year-old children are sensitive to the amount of contact between symmetrical blocks and a supporting platform and even anticipate which block is going to fall. Nonetheless, we found a considerable improvement with age in this respect. Two-year-olds did not consider an object’s weight distribution reliably when assessing its stability and even older preschoolers performed much more poorly with asymmetrical than symmetrical blocks. We conclude that intuitions about support are still weak and limited in toddlers and that they improve considerably during early childhood.
Development of bidirectional phono-semantic activation in toddlers
Authors: Angulo-Chavira Armando , Arias-Trejo Natalia
Published: January 2018

A mediated priming effect refers to the activation of a target via a mediator previously activated by a prime. This effect has been found at 24 months of age for phono-semantic links: a prime ( cup) activates a target ( dog) via a mediator ( cat), providing evidence of activation in a forward direction (phonological to semantic). Interactive models, however, propose that activation propagates in both forward and backward directions between processing levels. This study investigated the development of bidirectional co-activation of phonological and semantic levels of processing in Spanish-speaking toddlers. In a primed preferential looking task, participants were exposed to an unlabelled prime image, followed by the presentation of two images, a target and a distractor. In Experiment 1, when images with a semantic-phonological relationship were presented, both 24- and 30-month-olds preferred to look at the named target with a relationship to the prime image ( dog- cat- cup). However, when an unrelated target image was named, 24-month-olds preferred to look at the target, but 30-month-olds did not. In Experiment 2, both 24- and 30-month-olds preferred to look at a target with a phono-semantic relationship to the prime ( cup- cat- dog) over an unrelated target. These results provide strong evidence of differences in the development of forward and backward interactions between semantic and phonological processing levels.
Metacognitive judgements of perceptual-motor steering performance
Authors: Mole Callum D , Jersakova Radka , Kountouriotis Georgios K , Moulin Chris JA , Wilkie Richard M
Published: January 2018

Control of skilled actions requires rapid information sampling and processing, which may largely be carried out subconsciously. However, individuals often need to make conscious strategic decisions that ideally would be based upon accurate knowledge of performance. Here, we determined the extent to which individuals have explicit awareness of their steering performance (conceptualised as “metacognition”). Participants steered in a virtual environment along a bending road while attempting to keep within a central demarcated target zone. Task demands were altered by manipulating locomotor speed (fast/slow) and the target zone (narrow/wide). All participants received continuous visual feedback about position in zone, and one sub-group was given additional auditory warnings when exiting/entering the zone. At the end of each trial, participants made a metacognitive evaluation: the proportion of the trial they believed was spent in the zone. Overall, although evaluations broadly shifted in line with task demands, participants showed limited calibration to performance. Regression analysis showed that evaluations were influenced by two components: (a) direct monitoring of performance and (b) indirect task heuristics estimating performance based on salient cues (e.g., speed). Evaluations often weighted indirect task heuristics inappropriately, but the additional auditory feedback improved evaluations seemingly by reducing this weighting. These results have important implications for all motor tasks where conscious cognitive control can be used to influence action selection.
The influence of short-term language-switching training on the plasticity of the cognitive control mechanism in bilingual word production
Authors: Wu Junjie , Kang Chunyan , Ma Fengyang , Gao Xiaoyi , Guo Taomei
Published: January 2018

This study examined the effect of short-term language-switching training on the cognitive control mechanism in bilingual word production. In two experiments, two groups of relatively proficient but unbalanced Chinese–English bilinguals performed a cued picture-naming task, in which they switched between their two languages. On two consecutive days, the participants took part in four sessions. The same procedure was employed on 2 days in Experiment 1, whereas the cue-language mapping was reversed on Day 2 in Experiment 2. In both experiments, picture naming in the dominant language (L1, Chinese) was slower than that in the weaker second language (L2, English) in all sessions. In addition, the reversed language dominance effect was enhanced with training, suggesting that training proactively increases the amount of inhibition of the dominant L1 at the global level. Furthermore, switching costs in the L1 were reduced with training in Experiment 1, but not in Experiment 2. These results indicate that language-switching training improves the efficiency of reactively exerting inhibitory control over the dominant L1 at the local level. However, when a cue matches with different target languages, the effect of training is absent at the local level. These findings reveal the plasticity and complexity of the cognitive control mechanism as a function of bilingual experience, particularly in language switching.
Free operant observing in humans: a translational approach to compulsive certainty seeking
Authors: Morein-Zamir Sharon , Shahper Sonia , Fineberg Naomi A , Eisele Verena , Eagle Dawn M , Urcelay Gonzalo , Robbins Trevor W
Published: January 2018

Excessive checking is reported in non-clinical populations and is a pervasive symptom in obsessive compulsive disorder (OCD). We implemented a free-operant task in humans, previously used in rats, wherein participants can “check” to reduce uncertainty. Participants can press an observing key to ascertain which of two main keys will, if pressed, currently lead to rewards. Over a series of experiments, we found that punishment robustly increased observing in non-clinical participants and that observing persisted long after punishment was removed. Moreover, participants appeared insensitive to the initial costs of checking, and a threefold increase in the effort required to observe served to deter participants only to a limited degree. We also assessed observing in OCD patients with no known comorbidities. The patients observed more than control participants and were abnormally insensitive to the introduction of punishment. These findings support the translational value of the task, with similar behaviours in humans and rodents. This paradigm may serve as a unifying platform, promoting interaction between different approaches to analyse adaptive and maladaptive certainty seeking behaviours. Specifically, we demonstrate how seemingly disparate theoretical and empirical approaches can be reconciled synergistically to promote a combined behavioural and cognitive account of certainty seeking.
Investigating gaze processing in euthymic bipolar disorder: Impaired ability to infer mental state and intention, but preservation of social attentional orienting
Authors: Marotta Andrea , Delle Chiaie Roberto , Bernabei Laura , Grasso Rosangela , Biondi Massimo , Casagrande Maria
Published: January 2018

Euthymic bipolar disorder (BD) has been associated with subtle impairment in face processing. However, it is not known whether their difficulties extend to the processing of gaze. In the present study, two tasks, both of which rely on the ability to make use of the eye region of a pictured face, were used: the Reading the Mind in the Eyes test and the Eye-gaze cueing task. Compared to healthy controls, BD patients were impaired at judging mental state from images of the face but showed normal susceptibility to the direction of gaze as an attentional cue. These findings suggest that BD patients present selective gaze processing impairment, limited to the sensitivity to intention and emotion. This impairment could account at least partially for the higher levels of interpersonal problems generally observed in BD.
The role of intentions and outcomes in the foreign language effect on moral judgements
Authors: Costa Albert , Corey Joanna D , Hayakawa Sayuri , Aparici Melina , Vives Marc-Lluís , Keysar Boaz
Published: January 2018

We explore the origin of the foreign language effect on moral judgements by assessing whether language context alters the weight given to intentions and outcomes during moral judgement. Specifically, we investigated whether foreign language contexts, compared with native ones, may lead people to focus more on the outcomes of an action and less on the intentions behind it. We report two studies in which participants read scenarios in which the actor’s intentions and the resulting consequences were manipulated. As previously shown, people considered both the actor’s intentions and the action’s outcomes when assessing the damage, cause, moral wrongness, responsibility, and punishment deserved. However, although the foreign language context reduced the impact of intentions on damage assessment, the overall effect of intention and outcomes on these variables was mainly the same in the foreign and the native language contexts. We conclude that differential weighting of intentions and outcomes is unlikely to account for the impact of foreign language use on moral judgement.
“17” is odd and “seventeen” is even: Meaning and physical form in stimulus-parity synaesthesia
Authors: White Rebekah C , Dumbalska Tsvetomira , Duta Mihaela D , Nation Kate
Published: January 2018

For individuals with stimulus-parity synaesthesia, eliciting stimuli (e.g., shapes, numbers, letters, colours) trigger a compelling feeling of oddness or evenness. Given that (a) many inducers are conceptual and (b) parity is itself a conceptual property, one questions whether stimulus-parity synaesthesia will be a categorically higher subtype, such that the conceptual properties of stimuli will be crucial in determining parity. We explore this question as it applies to Synaesthete R, one of only two stimulus-parity synaesthetes known to the contemporary literature. In Experiments 1 and 2, we examine whether parity is tied to concepts or percepts, asking, for example, whether a rectangle is even regardless of whether it is presented as an image or a word. Our results indicate that the parity of shapes (words and images), numbers (words, digits, and Roman numerals), and letters (lowercase and uppercase) differs according to the stimulus format, supporting a perceptual explanation. In Experiment 3, we examine the parity of colour stimuli, showing a systematic relationship between the measurable physical properties of hue, saturation, and lightness and synaesthetic parity. Despite the conceptual nature of inducers and concurrents, for Synaesthete R, stimulus-parity synaesthesia is a lower subtype; perceptual properties of stimuli determine parity.
Effect of perceived length on numerosity estimation: Evidence from the Müller-Lyer illusion
Authors: Dormal Valérie , Larigaldie Nathanaël , Lefèvre Nathalie , Pesenti Mauro , Andres Michael
Published: January 2018

Previous studies showed that the magnitude information conveyed by sensory cues, such as length or surface, influences the ability to compare the numerosity of sets of objects. However, the perceptual nature of this representation and how it interacts with the processes involved in numerical judgements remain unclear. This study aims to address these issues by studying the interference of length on numerosity under different perceptual and response conditions. The first experiment shows that the influence of length does not depend on the actual length but on subjective values reflecting the way length is perceived in a given visual context. The Müller-Lyer illusion was used to manipulate the perceived length of two dot arrays independently of their actual length. When the length of two dot arrays was equal but perceived as different due to the illusion, participants erroneously reported differences in the number of dots contained in each array, evidencing a similar effect of Müller-Lyer illusion on length and numerosity comparison. This finding was replicated in a second experiment where participants had to give a verbal estimate of the number of dots contained in a given array, thereby eliminating the choice between a small or large response. Compared with a neutral condition, estimations were systematically larger than the actual number of dots as the illusory length increased. These results demonstrate that the illusory-induced experience of length influences numerosity estimation over and beyond objective cues and that this influence is not a response selection bias.
Why do I think and talk about it? Perceived functions and phenomenology of episodic counterfactual thinking compared with remembering and future thinking
Authors: Özbek Müge , Bohn Annette , Berntsen Dorthe
Published: January 2018

People revisit situations from their past and imagine what could have happened had the situation played out differently. This form of hypothetical thinking is known as episodic counterfactual thinking. The reasons why people engage in episodic counterfactual thinking have not been examined in the same context with remembering the past and imagining the future. We addressed this gap, by focusing on the perceived functions and phenomenological characteristics of the most important episodic counterfactuals compared with episodic memories and future projections in younger adults. We base our analyses on four categories of functions previously identified for past events: reflective, social, generative, and ruminative. The reflective and social functions dominated across all events, with the reflective function being most pronounced for future projections, potentially suggesting a close connection between future projections and self-regulation and/or identity formation. Counter to predictions, the ruminative function was not rated higher for episodic counterfactuals than for other events; however, ratings of ruminative function showed unique correlations with the emotional intensity and involuntary remembering for episodic counterfactuals. Overall, these results suggest that episodic counterfactuals are used for self-reflection and social sharing more than they are used for rumination and generative concerns.
Reaching and grasping with the tongue: Shared motor planning between hand actions and articulatory gestures
Authors: Vainio Lari , Tiippana Kaisa , Tiainen Mikko , Rantala Aleksi , Vainio Martti
Published: January 2018

Research has shown connections between articulatory mouth actions and manual actions. This study investigates whether forward–backward hand movements could be associated with vowel production processes that programme tongue fronting/backing, lip rounding/spreading (Experiment 1), and/or consonant production processes that programme tongue tip and tongue dorsum actions (Experiment 2). The participants had to perform either forward or backward hand movement and simultaneously pronounce different vowels or consonants. The results revealed a response benefit, measured in vocal and manual reaction times, when the responses consisted of front vowels and forward hand movements. Conversely, back vowels were associated with backward hand movements. Articulation of rounded versus unrounded vowels or coronal versus dorsal consonants did not produce the effect. In contrast, when the manual responses of forward–backward hand movements were replaced by precision and power grip responses, the coronal consonants [t] and [r] were associated with the precision grip, whereas the dorsal consonant [k] was associated with the power grip. We propose that the movements of the tongue body, operating mainly for vowel production, share the directional action planning processes with the hand movements. Conversely, the tongue articulators related to tongue tip and dorsum movements, operating mainly for consonant production, share the action planning processes with the precision and power grip, respectively.
Introspection during short-term memory scanning
Authors: Reyes Gabriel , Sackur Jérôme
Published: January 2018

The literature in metacognition has argued for many years that introspective access to our own mental content is restricted to the cognitive states associated with the response to a task, such as the level of confidence in a decision or the estimation of the response time; however, the cognitive processes that underlie such states were deemed inaccessible to participants’ consciousness. Here, we ask whether participants could introspectively distinguish the cognitive processes that underlie two short-term memory tasks. For this purpose, we asked participants, on a trial-by-trial basis, to report the number of items that they mentally scanned during their short-term memory retrieval, which we have named “subjective number of scanned items.” The subjective number of scanned items index was evaluated, in Experiment 1, immediately after a judgment of recency task and, in Experiment 2, after an item recognition task. Finally, in Experiment 3, both tasks were randomly mixed. The results showed that participants’ introspection successfully accessed the complexity of the decisional processes.
The role of lexical variables in the visual recognition of two-character Chinese compound words: A megastudy analysis
Authors: Tse Chi-Shing , Yap Melvin J
Published: January 2018

To examine the effect of lexical variables on two-character Chinese compound word processing, we performed item-level hierarchical regression analyses on lexical decision megastudy data of 18,983 two-character Chinese compound words. The first analysis determined the unique item-level variance explained by orthographic (frequency and stroke count), phonological (consistency, homophonic density), and semantic (transparency) variables. Both character and word variables were considered. Results showed that orthographic and semantic variables, respectively, accounted for more collective variance than phonological variables, suggesting that Chinese skilled readers rely more on orthographic and semantic information than phonological information when processing visually presented words. The second analysis tested interactive effects of lexical variables and showed significant semantic transparency × cumulative character frequency and word frequency × cumulative character frequency interactions. The effect of cumulative character frequency was stronger for transparent words than for opaque words and was stronger for low-frequency words than for high-frequency words. However, there was no semantic transparency × word frequency interaction in reaction time. Implications of the current findings on models of Chinese compound word processing are discussed.
The role of contextual information during skilled anticipation
Authors: Murphy Colm P , Jackson Robin C , Williams A Mark
Published: January 2018

In dynamic, temporally constrained tasks, individuals often need to anticipate what will happen next prior to information becoming available within the environment. In such situations, the availability of contextual information can facilitate anticipation, often in conjunction with postural information. While many researchers have identified the specific sources of postural information facilitating anticipation, few have investigated the specific sources of contextual information employed. In two experiments, we presented skilled and less-skilled tennis players with animations of rallies from real matches that omitted access to postural information from the opponent, constraining participants to anticipate based on contextual information alone. In Experiment 1, participants anticipated the outcome of an opponent’s shot under three conditions in which the sequence length (i.e., number of shots in a rally) preceding the same occluded shot was varied. Participants anticipated shot direction more accurately when the preceding shot sequence was presented than not. In Experiment 2, we presented animations that depicted the ball, the players, or both, in either dynamic or still form. Those conditions in which only the ball was depicted yielded the lowest response accuracy scores. It appears that information from the player and ball motion is required to provide the context under which skilled performers can consciously pick up and utilise information to anticipate more accurately than their less-skilled counterparts.
Gaze in a real-world social interaction: A dual eye-tracking study
Authors: Macdonald Ross G , Tatler Benjamin W
Published: January 2018

People communicate using verbal and non-verbal cues, including gaze cues. Gaze allocation can be influenced by social factors; however, most research on gaze cueing has not considered these factors. The presence of social roles was manipulated in a natural, everyday collaborative task while eye movements were measured. In pairs, participants worked together to make a cake. Half of the pairs were given roles (“Chef” or “Gatherer”) and the other half were not. Across all participants we found, contrary to the results of static-image experiments, that participants spent very little time looking at each other, challenging the generalisability of the conclusions from lab-based paradigms. However, participants were more likely than not to look at their partner when receiving an instruction, highlighting the typical coordination of gaze cues and verbal communication in natural interactions. The mean duration of instances in which the partners looked at each other (partner gaze) was longer in the roles condition, and these participants were quicker to align their gaze with their partners (shared gaze). In addition, we found some indication that when hearing spoken instructions, listeners in the roles condition looked at the speaker more than listeners in the no roles condition. We conclude that social context can affect our gaze behaviour during a social interaction.
The role of speech fidelity in the irrelevant sound effect: Insights from noise-vocoded speech backgrounds
Authors: Dorsi Josh , Viswanathan Navin , Rosenblum Lawrence D , Dias James W
Published: January 2018

The Irrelevant Sound Effect (ISE) is the finding that background sound impairs accuracy for visually presented serial recall tasks. Among various auditory backgrounds, speech typically acts as the strongest distractor. Based on the changing-state hypothesis, speech is a disruptive background because it is more complex than other nonspeech backgrounds. In the current study, we evaluate an alternative explanation by examining whether the speech-likeness of the background (speech fidelity) contributes, beyond signal complexity, to the ISE. We did this by using noise-vocoded speech as a background. In Experiment 1, we varied the complexity of the background by manipulating the number of vocoding channels. Results indicate that the ISE increases with the number of channels, suggesting that more complex signals produce greater ISEs. In Experiment 2, we varied complexity and speech fidelity independently. At each channel level, we selectively reversed a subset of channels to design a low-fidelity signal that was equated in overall complexity. Experiment 2 results indicated that speech-like noise-vocoded speech produces a larger ISE than selectively reversed noise-vocoded speech. Finally, in Experiment 3, we evaluated the locus of the speech-fidelity effect by assessing the distraction produced by these stimuli in a missing-item task. In this task, even though noise-vocoded speech disrupted task performance relative to silence, neither its complexity nor speech fidelity contributed to this effect. Together, these findings indicate a clear role for speech fidelity of the background beyond its changing-state quality and its attention capture potential.
Lift speed moderates the effects of muscle activity on perceived heaviness
Authors: Waddell Morgan L , Amazeen Eric L
Published: January 2018

Research has shown that perceived heaviness is a function of the ratio of muscle activity (measured by electromyogram [EMG]) to the resulting acceleration of the object. However, objects will commonly be lifted at different speeds, implying variation in both EMG and acceleration. This study examined the effects of lifting speed by having participants report perceived heaviness for objects lifted by elbow flexion at three different speeds: slow, preferred, and fast. EMG and angular acceleration were recorded during these lifts. Both EMG and angular acceleration changed across lift speed. Nevertheless, despite these variations, perceived heaviness consistently scaled to the ratio of EMG to angular acceleration. The exponents on these parameters suggested that the saliency of muscle activity and movement changed across the three lift speeds.
Working memory for self-initiated and provided spatial configurations
Authors: Magen Hagit , Emmanouil Tatiana Aloi
Published: January 2018

During a typical day, people temporarily memorise information provided to them. However, they memorise as often information they actively choose themselves. Although prevalent in everyday behaviour, this aspect of working memory (WM), we term self-initiated WM, has been largely unexplored. In this study, we used a modified spatial span task in which participants constructed the spatial sequences they maintained in memory. The results of three experiments demonstrated that participants planned and constructed structured spatial sequences by minimising the distances between successive locations and by selecting sequences with fewer path crossings. The sequences were initiated most often on the top left side. Memory accuracy was enhanced when participants memorised self-initiated spatial sequences, even when the self-initiated and provided sequences were matched for structure. When asked to construct spatial sequences for a hypothetical competitor in a memory contest, participants constructed complex sequences with longer paths and more path crossings, suggesting that these sequence parameters were under their control. The tendency to initiate the spatial sequences on the top left side remained. Overall, the results suggest that self-initiated WM can benefit from explicit metacognitive knowledge of the ideal structure of memory representations and also demonstrate that self-initiation benefits memory beyond structure.
Revisiting peak shift on an artificial dimension: Effects of stimulus variability on generalisation
Authors: Livesey Evan J , McLaren Ian PL
Published: January 2018

One of Mackintosh’s many contributions to the comparative psychology of associative learning was in developing the distinction between the mental processes responsible for learning about features and learning about relations. His research on discrimination learning and generalisation served to highlight differences and commonalities in learning mechanisms across species and paradigms. In one such example, Wills and Mackintosh trained both pigeons and humans to discriminate between two categories of complex patterns comprising overlapping sets of abstract visual features. They demonstrated that pigeons and humans produced similar “peak-shifted” generalisation gradients when the proportion of shared features was systemically varied across a set of transfer stimuli, providing support for an elemental feature-based analysis of discrimination and generalisation. Here, we report a series of experiments inspired by this work, investigating the processes involved in post-discrimination generalisation in human category learning. We investigate how post-discrimination generalisation is affected by variability in the spatial arrangement and probability of occurrence of the visual features and develop an associative learning model that builds on Mackintosh’s theoretical approach to elemental associative learning.
An item-level analysis of lexical-semantic effects in free recall and recognition memory using the megastudy approach
Authors: Lau Mabel C , Goh Winston D , Yap Melvin J
Published: January 2018

Psycholinguists have developed a number of measures to tap different aspects of a word’s semantic representation. The influence of these measures on lexical processing has collectively been described as semantic richness effects. However, the effects of these word properties on memory are currently not well understood. This study examines the relative contributions of lexical and semantic variables in free recall and recognition memory at the item-level, using a megastudy approach. Hierarchical regression of recall and recognition performance on a number of lexical-semantic variables showed task-general effects where the structural component, frequency, number of senses, and arousal accounted for unique variance in both free recall and recognition memory. Task-specific effects included number of features, imageability, and body–object interaction, which accounted for unique variance in recall, whereas age of acquisition, familiarity, and extremity of valence accounted for unique variance in recognition. Forward selection regression analyses generally converged on these findings. Hierarchical regression also revealed that lexical variables accounted for more variance in recognition compared with recall, whereas semantic variables accounted for more unique variance above and beyond lexical variables in recall compared with recognition. Implications of the findings are discussed.
Tracing the path of forgetting in rule abstraction and exemplar retrieval
Authors: Hoffmann Janina A , von Helversen Bettina , Weilbächer Regina A , Rieskamp Jörg
Published: January 2018

People often forget acquired knowledge over time such as names of former classmates. Which knowledge people can access, however, may modify the judgement process and affect judgement accuracy. Specifically, we hypothesised that judgements based on retrieving past exemplars from long-term memory may be more vulnerable to forgetting than remembering rules that relate the cues to the criterion. Experiment 1 systematically tracked the individual course of forgetting from initial learning to later tests (immediate, 1 day, and 1 week) in a linear judgement task facilitating rule-based strategies and a multiplicative judgement task facilitating exemplar-based strategies. Practising the acquired judgement strategy in repeated tests helped participants to consistently apply the learnt judgement strategy and retain a high judgement accuracy even after a week. Yet, whereas a long retention interval did not affect judgements in the linear task, a long retention interval impaired judgements in the multiplicative task. If practice was restricted as in Experiment 2, judgement accuracy suffered in both tasks. In addition, after a week without practice, participants tried to reconstruct their judgements by applying rules in the multiplicative task. These results emphasise that the extent to which decision makers can still retrieve previously learned knowledge limits their ability to make accurate judgements and that the preferred strategies change over time if the opportunity for practice is limited.
The influence of social network size on speech perception
Authors: Lev-Ari Shiri
Published: January 2018

Infants and adults learn new phonological varieties better when exposed to multiple rather than a single speaker. This article tests whether having a larger social network similarly facilitates phonological performance. Experiment 1 shows that people with larger social networks are better at vowel perception in noise, indicating that the benefit of laboratory exposure to multiple speakers extends to real life experience and to adults tested in their native language. Furthermore, the experiment shows that this association is not due to differences in amount of input or to cognitive differences between people with different social network sizes. Follow-up computational simulations reveal that the benefit of larger social networks is mostly due to increased input variability. Additionally, the simulations show that the boost that larger social networks provide is independent of the amount of input received but is larger if the population is more heterogeneous. Finally, a comparison of “adult” and “child” simulations reconciles previous conflicting findings by suggesting that input variability along the relevant dimension might be less useful at the earliest stages of learning. Together, this article shows when and how the size of our social network influences our speech perception. It thus shows how aspects of our lifestyle can influence our linguistic performance.
Faces, people and the brain: The 45th Sir Frederic Bartlett Lecture
Authors: Young Andrew W
Published: January 2018

The fact that the face is a source of diverse social signals allows us to use face and person perception as a model system for asking important psychological questions about how our brains are organised. A key issue concerns whether we rely primarily on some form of generic representation of the common physical source of these social signals (the face) to interpret them, or instead create multiple representations by assigning different aspects of the task to different specialist components. Variants of the specialist components hypothesis have formed the dominant theoretical perspective on face perception for more than three decades, but despite this dominance of formally and informally expressed theories, the underlying principles and extent of any division of labour remain uncertain. Here, I discuss three important sources of constraint: first, the evolved structure of the brain; second, the need to optimise responses to different everyday tasks; and third, the statistical structure of faces in the perceiver’s environment. I show how these constraints interact to determine the underlying functional organisation of face and person perception.
Time of day effects on the use of distraction to minimise forgetting
Authors: Ngo Ka Wai Joan , Biss Renée Katherine , Hasher Lynn
Published: January 2018

Recent research found that implicit rehearsal of distraction can reduce forgetting for older adults, in part due to their inefficient regulation of irrelevant information. Here, we investigated whether young adults’ memory can also benefit from critical information presented as distraction. Participants recalled a list of words initially and then again after a 15-min delay, with some of the critical studied words exposed as distraction during the delay. We tested young adults at an optimal versus non-optimal time of day, the latter a condition intended to mirror patterns of those with reduced attention regulation. We also varied task instruction to assess whether awareness of an upcoming memory task would influence implicit rehearsal of distraction. The task instruction manipulation was ineffective, but desynchronising time of testing and period of optimal cognitive arousal resulted in a memory benefit. Young adults tested at a non-optimal time showed minimal forgetting of words repeated as distraction, while those tested at an optimal time showed no memory benefit for these items, consistent with research suggesting that attention regulation is greatly affected by circadian arousal.