NCube/papyrus huggingface dataset:
Academic and social adjustment of teenagers in social rehabilitation : the role of intrinsic need satisfaction and autonomy support

Prior studies have demonstrated the benefits of intrinsic need satisfaction and autonomy support in the domain of education. It remains unclear whether the motivational constructs, derived from Self-Determination Theory (Deci & Ryan, 2000) are also beneficial for clinical populations. The purpose of this thesis is to shed light on how social and academic adjustment might be promoted by socializing agents in the context of social rehabilitation.   This dissertation is composed of two studies investing SDT key tenets within two samples of maladjusted teenagers receiving special education and social rehabilitation services. The relations between key motivational constructs are investigated to determine if, as proposed by SDT, youths’ intrinsic need satisfaction might by promoted by socializing agents’ interpersonal style (i.e., autonomy support, involvement, and structure). It is also predicted that these constructs will lead to motivational and experiential benefits as proposed by SDT. The first study tested whether teachers’ interpersonal style can foster students’ need satisfaction, motivation style, as well as their academic adjustment. Teenagers (N = 115) enrolled in Social Rehabilitation Centers’ special schools for maladjusted youths with severe emotional and behavioral problems completed questionnaires twice, at the beginning and the end of the school year. Structural equation modeling analysis supports a model in which teachers’ improvements in autonomy support and involvement (but not structure) are associated with students’ higher need satisfaction, which in turns leads to self-determined academic motivation and less dropout intentions at the end of the school year. Furthermore, improvement in need satisfaction leads directly to a better affective experience at school.    The second study was an experimental research conducted with maladjusted female adolescents (N = 29). The experimental design allowed comparing the impact of learning a tedious, but important clinical workshop with (vs. without) autonomy support on the internalization of the interpersonal problem solving task and positive motivational and experiential outcomes. The results suggest that an autonomy-supportive interpersonal style is beneficial to youths’ experience, leading to higher self-determined motivation, perceived task’s value, task liking as well as less negative affect compared to a condition without autonomy support. Results are discussed along with the theoretical and practical implications of extending the reach of SDT to a clinical population of maladjusted teenagers.

Keyphrases: Motivation, Self-Determination Theory, Autonomy support, Intrinsic need satisfaction, Motivation, Self-determined motivation, Internalization, Academic and social adjustment, Clinical population
Le chunking perceptif de la parole : sur la nature du groupement temporel et son effet sur la mémoire immédiate

In numerous behaviors involving the learning and production of sequences, temporal groups emerge spontaneously, created by delays or a lengthening of elements. This chunking has been observed across behaviors of both humans and animals and is taken to reflect a general process of perceptual chunking that conforms to capacity limits of short-term memory. Yet, no research has determined how perceptual chunking applies to speech. We provide a literature review that bears out critical problems, which have hampered research on this question. Consideration of these problems motivates a principled demonstration that aims to show how perceptual chunking applies to speech and the effect of this process on immediate memory (or “working memory”). These two themes are presented in separate papers in the format of journal articles.  Paper 1: The perceptual chunking of speech: a demonstration using ERPs To observe perceptual chunking on line, we use event-related potentials (ERPs) and refer to the neural component of Closure Positive Shift (CPS), which is known to capture listeners’ responses to marks of prosodic groups. The speech stimuli were utterances and sequences of nonsense syllables, which contained intonation phrases marked by pitch, and both phrase-internal and phrase-final temporal groups marked by lengthening. Analyses of CPSs show that, across conditions, listeners specifically perceive speech in terms of chunks marked by lengthening. These lengthening marks, which appear universally in languages, create the same type of chunking as that which emerges in sequence learning by humans and animals. This finding supports the view that listeners chunk speech in temporal groups and that this perceptual chunking operates similarly for speech and non-verbal behaviors. Moreover, the results question reports that relate CPS to intonation phrasing without considering the effects of temporal marks.  Paper 2: Perceptual chunking and its effect on memory in speech processing: ERP and behavioral evidence We examined how the perceptual chunking of utterances in terms of temporal groups of differing size influences immediate memory of heard speech. To weigh these effects, we used behavioural measures and ERPs, especially the N400 component, which served to evaluate the quality of the memory trace for target lexemes heard in the temporal groups. Variations in the amplitude of the N400 showed a better memory trace for lexemes presented in groups of 3 syllables compared to those in groups of 4 syllables. Response times along with P300 components revealed effects of position of the chunk in the utterance.  This is the first study to demonstrate the perceptual chunking of speech on-line and its effects on immediate memory of heard elements. Taken together the results suggest that a general perceptual chunking enhances a buffering of sequential information and a processing of speech on a chunk-by-chunk basis.

Keyphrases: Chunking, CPS, N400, P300, Speech segmentation, Prosody, Pre-boundary lengthening, Event-related potentials, Short-term memory
Pour boire il faut vendre : les publicités de bière au Québec dans les années 1920 et 1950

This thesis is interested in beer advertising campaigns published in various newspapers and magazines in the 1920s and 1950s in the province of Quebec, two post-war periods marked by economic prosperity and the development of mass consumption. This comparative study aims at emphasizing the evolution in beer representations and the strategies used by advertising agents in order to make beer more legitimate in the eyes of society. In addition to examining the various discourses used by advertising agents to sell their product, we show that the topics and strategies retained are directly influenced by the values, ideas, and social norms and by the legislative context of the Québec society for each decade. We also support the assumption that gender, but particularly the dominant discourse of masculinity, strongly influenced the construction of the different beer advertising campaigns during the 1920s and 1950s; the culture of alcohol, but especially that of beer, is a male bastion which tends to resist the integration of women and femininity. Keywords

Keyphrases: brasseries, publicity, beer, alcohol, tavern, brewery, gender, masculinity, feminity
Étude intracrânienne sur les mécanismes cérébraux permettant la reconnaissance d’objets

Recognizing objects is a complex task requiring the brain to assemble visual information in such a way that coherent perception can happen. Building a visual cerebral representation is done through a bottom-up process, involving mainly occipital and temporal areas. A top-down mechanism from parietal and frontal areas, is thought to facilitate recognition by taking into account expectations and generating possible candidates. However, the precise mechanisms by which all these processes are done are still unclear.  Studies investigating induced gamma response were able to link this activity to coherent perception of objects, suggesting a significant role of this activity in object recognition. However, these studies used imprecise recording techniques and stimuli repetition. The first study of this thesis aimed at describing with more precision the induced gamma activity using intracranial encephalography and a fragmented images paradigm in which only new stimuli are presented. Moreover, the task was presented again 24 hours later to circumscribe top-down mechanisms. Results show that the induced gamma activity is highest at recognition in regions involved in bottom-up processes. Top-down mechanism involved occipito-parietal areas when images were presented for the first time. When images were presented again 24 hours later, frontal areas mediated top-down facilitation, suggesting that top-down mechanisms vary according to task demand.    Alpha rhythm has been less clearly related to visual perception, but is nevertheless well known to be involved in attention, memory and long-distance brain communication. The second study of this thesis investigated the role of alpha rhythm in object recognition, using the same technique and task as in the first study. Time-frequency analysis revealed a strong alpha activity unspecific to recognition, which was propagating from posterior to anterior regions. Phase coherence analysis, however, showed significant phase synchronisation specific to recognition. A similar pattern of alpha activity was found 24 hours later. However, the activity was stronger in frontal regions and the phase synchronisation was more distributed. Alpha rhythm is thus thought to be involved in attentional and communicational mechanisms of object recognition. In conclusion, this thesis was able to describe the precise spatio-temporal dynamics of induced gamma and alpha activity and suggest potential roles of these rhythms in response to object recognition.

Keyphrases: Attention, Communication neuronale, Vision, Alpha rhythm, Bottom-up processes, Induced gamma response, Intracranial electroencephalography, Memory, Neuronal communication, Object recognition, Top-down mechanisms
L’entérotoxine STb d’Escherichia coli affecte les jonctions serrées des cellules intestinales épithéliales

Escherichia coli heat-stable toxin (STb) causes diarrhea in Man and animals. STb binds to sulfatide, its receptor, followed by its internalization. Inside the cytoplasm, through a cascade of events, STb triggers the opening of ion channels allowing ion secretion and water loss leading to diarrhea. Tight junctions (TJs) are well known for controlling paracellular traffic of ions and water by forming a physical intercellular barrier in epithelial cells. Some bacterial toxinz are known to affect adversibly TJs. To date, the impact of STb on TJs has not been investigated. The present study aimed to explore the effect of STb on TJs and the barrier function in intestinal epithelial cells. Human colon intestinal epithelial cells (T84) were treated for 24h with either purified STb toxin or an E. coli strains expressing STb. TransEpithelial Resistance (TER), paracellular flux marker and confocal microscopy were used to analyze the effect of STb toxin on TJs. An E. coli strains expressing STb as well as purified STb caused a significant reduction of TER (p<0.0001) parallely to an increase in paracellular permeability to BSA-FITC (p<0.0001) compared to untreated cells or a commensal non toxinogenic E.coli strain. The increased paracellular permeability induced by STb was associated with a marked general dissolution and condensation of central F-actin stress fibers. F-actin disorganisation was accompanied by redistribution and fragmentation of occludin, claudin-1 and ZO-1 (Zonula Occludens-1) proteins. These changes were also observed following intoxication of T84 cells with an 8 amino acids peptide found in the STb sequence corresponding to a consensus sequence of Vibrio cholerae Zot toxin, shown to be involved in TJs disassembly. This effect was not observed with the scramble peptide and D30V mutant. Our findings suggest that STb induces epithelial barrier dysfunction by changes in tight junction proteins that could contribute to the observed diarrhea. These results provide new insight into the diarrhea pathogenesis caused by STb.

Keyphrases: Escherichia coli, Tight junctions, Actin cytoskeleton, Transepithelial resistance, Diarrhea, Paracellular permeability, Escherichia coli, Secretion, STb toxin
Étude des mécanismes moléculaires de formation des pores des toxines formeuses de pores par la spectroscopie de fluorescence

Pore forming toxins (PFTs) are exogenous often pathogenic proteins that permeabilize the host membrane. Permeabilization or subsequent introduction of an enzyme leads to health disorders and sometimes death. Although the fundamental infection and destruction mechanisms are known, the underlying molecular basis and their link to the structural information remains undetermined for many pore forming toxins. The purpose of this thesis was to study the mechanisms of oligomerization on the membrane and pore formation of PFTs using fluorescence spectroscopy in planar lipid bilayer. We chose Cry1Aa as the most intensively studied member of Bacillus thuringiensis’s toxins.  In order to probe the topology both in inactive and active congformation, we used Förster resonance energy transfer (FRET) between a fluorophore site-directedly attached to different positions in the pore forming domain (D1) of Cry1Aa toxin and an acceptor compound dipicrylamine (DPA) in the membrane, which moves in response to the membrane potential. Electrical current and fluorescence emission from planar lipid bilayers in a horizontal configuration were simultaneously recorded. We probed all loops between the seven α helices of D1. All of them were located on the inner leaflet of the bilayer prior to pore formation. In the active form, the α3-α4 hairpin were found to translocate back to the outer leaflet of the bilayer, whereas all other positions remained in the inner leaflet, suggesting that α3-α4 are the pore lining helices.   The toxins undergo significant conformational changes once they enter the host membrane, and we found Cry1Aa to attack from the exterior but translocate to the interior. To estimate the distribution of the toxins on either side of the membrane, we used the double-FRET technique. Here, two different acceptors (DPA and oxonol) with different dynamics (time constants) allowed us to determine that approximately equal amounts of the toxin were present on either leaflet during the permeabilization process.  We also studied the oligomerization mechanism of Cry1Aa toxins inserted into supported lipid bilayers using a single subunit counting technique based on the step-wise photodestruction (bleaching) of the attached fluorophores. This system allowed determining the number of subunits composing each oligomer. We found that oligomerization is a highly dynamic process which occurs after insertion into the bilayer by lateral diffusion. The final (likely the pore forming) entity of the toxin is tetrameric.    Finally, we used the same FRET approach to investigate the gating process of two positions of the pore forming domain of colicin Ia, an antibiotic toxin produced by E. coli. These positions were suspected to translocate reversibly from the outer to the inner leaflet during the gating process. In preliminary results, we found that these positions are moving between the two leaflets of the bilayer during pore formation.

Keyphrases: pore, FRET, Cry1Aa, DPA, TMRM, Oxonol, toxins, lipid bilayer, colicin Ia, fluorescence spectroscopy
La politique des nationalités : vecteur d’expansion internationale du Second Empire français (1859-1868)

The Second French Empire was a period of great change on the international scene in Europe and America. Using the diverse national crises that were shaking the European and American balance of power, Napoleon III intended to use these crises in order to favour French influence in regions where her interests were starting to become vital for worldwide supremacy. Put forward as a means of power, the policy of nationalities is an abstract political idea that creates a political discourse which favors imperial projects around the world. The objective of the policy of nationalities aims at the installation of monarchies allied to France which can be installed in various ways, through war, territorial exchanges or by a new method, popular referenda. However, all of these regimes were installed in the name of nationality. Yet what is innovative in the policy of nationalities, is the systematic recourse to the will of the people as a means to legitimize France’s territorial expansion. This manifested itself in a controlled election or by an assembly of well chosen notables. There was always a need to appear lawful in the eyes of the foreign populations. Using primary sources and a variety of historical studies, this research’s aim is to analyze the methods used by Napoleon III to promote France’s policy of nationalities. We will study the dynamic of this policy and the way the national argument was used during political crises in Italy, Germany, Mexico and the ottoman province of Syria.

Keyphrases: relations internationales (1851-1870), Second French Empire, Napoleon III, international relations (1851-1870), policy of nationalities
Quels sont les facteurs menant à la consommation de services sexuels rémunérés dans un contexte touristique à l’étranger? : le cas du tourisme sexuel au Mexique

It has been demonstrated that the human being has a latent inclination for transgression, which is restrained by formal and informal standards set by its community. If, however, we take an individual out of its community, will he be more inclined to transgress norms? The present thesis attempts to expound that situation. We aim to understand the process that leads one to consume paid sexual services in a touristic context abroad by studying sex tourism in Mexico. We are trying to define the factors that motivate, or at least, favour this type of consummation in such context. We use a body of evidence composed of comments published by sex tourists on an online forum, and of existing data to account for these factors. We analyze these evidences by combining intersectionality and social control on a theoretical level. Specifically, we review the comments alone in order to understand the tourists' motives to seek sex tourism, and we analyze the existing data, establishing links with the published comments as to identify the factors permitting tourists to engage in that practice.

Keyphrases: Sexual tourism, Mexico, Social control, consummation of paid sexual services, Intersectionality, Power relationship, Patriarcat, Patriarchy, Pursuits of exotism and authenticity, Gender relations, Race and class relations
Le rôle de la sérotonine sur le développement de traits anxieux : une étude
de trajectoire longitudinale

A number of genes known to modulate serotonin (5-hydroxytryptamine, 5-HT) have been associated with anxiety-related temperaments. A limitation in most of these studies is that the studies are cross-sectional and anxiety has been measured at a single point in time. Furthermore, only a few studies have been done in children. The aim of the present study was to investigate the role of the HTR2A and TPH2 gene in the development of trajectories of anxiety in childhood/ adolescence. Associations between these genes, anxiety trajectories in childhood and anxiety diagnoses in adulthood were also investigated. Finally, gender differences were explored. Research questions were investigated in the Quebec Longitudinal Study of Kindergarten Children, consisting of 3185 boys and girls, selected in 1986-1987. Children`s anxiety was rated by their teacher every year between the age of 6 and 12 years. The ratings were modeled into behavioral trajectories. 5-HT genotyping data were available for 1068 cohort members. Data were analyzed using Chi-square statistics, logistic regressions and ANOVAs. Out of 37 investigated polymorphisms, several polymorphisms, such as 5-HTR2A (rs1328684, rs95534511, rs1745837, rs7984966, 7330636) and TPH2 (rs11179050, rs11179052, rs1386498) were associated with a high anxiety trajectory. Though trajectories of high anxiety in childhood did not predict an anxiety diagnosis at age 21, relationships were found between HTR2A and TPH2 SNPs and anxiety diagnosis at age 21. We note that the SNPs associated with anxiety were different between adults and children. The strength of association between the investigated genes and anxiety differed between boys and girls. This is the first study reporting an association with some HTR2A and TPH2 variants and trajectories of anxiety in children. Future studies should replicate the findings in other samples, investigate the interaction with stressors, and study the functional relevance of the SNPs

Keyphrases: Serotonin, HTR2A, TPH2, trajectory, anxiety
Nature et origine évolutive de la religion : conciliation des perspectives anthropologique et psychobiologique

Religion is a universal cultural phenomenon that is central to anthropology, yet a lack of theoretical agreement about its definition and origin is obvious when comparing dictionaries and introductory handbooks. Hypotheses addressing this question have been available for the past two or three decades in the field of psychobiology, and this thesis explores whether anthropological theories of religion can offer a definition and explanations as to the origin of religion that are, at least in part, in agreement with psychobiology. First, a summary of the hypotheses offered by psychobiology is presented. This will serve as an analytical benchmark with which to compare anthropological theories on religion. Two such theories are summarised and analysed in terms of their proposed definition of religion, their universal elements, and their theoretical bases, that of Sir Edward Burnett Tylor ([1874] 1889) and that of Clifford Geertz ([1966] 2010). Both are influential theories, but have opposing theoretical foundations. The analysis shows that only Tylor’s theory supports the hypothesis of this thesis, which states that some anthropological conceptions and explanations of religion are compatible. Regardless the discrepancy between all the analysed sources, these could be conciliated, in a preliminary model of the nature and the evolutionnary roots of religion.

Keyphrases: Religion, Cognition, Psychobiology, Human nature, Universals, Evolutionary roots, Tylor, Geertz