The purpose of the present work was to study hand impairments and manual ability in children with cerebral palsy (CP) as well as to clarify their relationship. Appraising the degree of hand impairments requires normative data to differentiate the real dysfunctions of CP children from the normal difficulties according to their age, sex, or handedness. As there is no normative data for gross manual and fine finger dexterity, a first experiment focused on the normal development of manipulative functions was conducted to establish these norms. A second experiment was carried out to develop and validate through the Rasch model a measure of manual ability in children with CP since such a measure was not yet available. The invariance of the ABILHAND-Kids questionnaire was also tested across relevant demographic and clinical subgroups of CP children. Finally, a third experiment was performed to quantify the hand impairments in children with CP and to investigate their relationship with manual ability as measured with the ABILHAND-Kids questionnaire. Hand motor impairments, markedly more prevalent than hand sensory impairments, were moderately correlated with manual ability measures and predicted 58% of their variance. Consequently, manual ability cannot simply be inferred from hand impairments and should be measured and treated per se. / L'objectif de ce travail était d'étudier les déficiences de la main et l'habileté manuelle chez les enfants infirmes moteurs d'origine cérébrale (IMOC) ainsi que de clarifier leur relation. Apprécier la gravité des déficiences de la main nécessite des données normatives afin de différencier les dysfonctionnements réels des enfants IMOC des difficultés normales compte tenu de leur âge, sexe, ou latéralité. Etant donné l'absence de normes quant à la dextérité manuelle grossière et la dextérité digitale fine, une première étude a été réalisée afin d'examiner le développement normal de ces deux types de dextérité. Des normes sur les dextérités manuelle grossière et digitale fine ont ainsi pu être établies. Une deuxième étude a été effectuée afin de développer et valider à travers le modèle de Rasch une mesure de l'habileté manuelle chez les enfants IMOC. L'invariance du questionnaire ABILHAND-Kids a également testée à travers différents sous-groupes démographiques et cliniques d'enfants IMOC. Enfin, une troisième étude a été réalisée afin de quantifier les déficiences de la main chez les enfants IMOC et d'investiguer leur relation avec l'habileté manuelle. Les déficiences motrices de la main, plus prévalentes que les déficiences sensitives, étaient modérément corrélées avec les mesures d'habileté manuelle et prédisaient 58% de leur variance. En conséquence, l'habileté manuelle ne peut être simplement inférée à partir des déficiences de la main et devrait donc être mesurée et traitée pour elle-même.

The topic of racism and prejudice is a very sensitive issue for many Canadians. This is primarily due to Canada's cherished image as a tolerant society leads even the most progressive people to adopt the belief that racism is comprised of only overt acts. However, what is not acknowledged by this old-fashioned view of prejudice is that the nature and expression of prejudice has evolved into a more covert form of prejudice known as modern prejudice (McConahay, 1986). This is particularly important because there is a well documented history of prejudice and discrimination of Aboriginal peoples in Canada, and without a proper understanding of the changing face of prejudice in Canada it is difficult to determine if there in fact has been a reduction in prejudiced attitudes towards Aboriginal peoples in Canada.<p> This study examines the criterion-related validity of the Prejudice Attitudes Towards Aboriginals Scale (PATAS) (Morrison, 2007) a 25 item (11 old-fashioned prejudice items and 14 modern prejudice items) newly developed measure of prejudicial attitudes towards Aboriginals developed using the theory of Modern Prejudice (McConahay, 1986). Four hundred and five undergraduate students completed a questionnaire including the PATAS, Right-wing Authoritarianism scale (RWA scale) (Altemeyer, 2007), Social Dominance Orientation scale (SDO5) (Pratto, Sidanius, Stallworth, and Malle, 1994), Motivation to Control Prejudice Reactions Scale (MCPRS) (Dunton and Fazio, 1997), and Form C of the Marlowe Crowne Social Desirability Scale (Renolds, 1982).<p> The results of this investigation revealed evidence attesting to the criterion-related validity of the PATAS. Participants who scored high on the PATAS also had high scores on the RWA scale, SDO5 scale, and tended to have a conservative political orientation. However, contrary to expectations, religious self schema was not found to be associated with PATAS scores. Practical applications and limitations of these findings are discussed as are possible directions for future research.

The topic of racism and prejudice is a very sensitive issue for many Canadians. This is primarily due to Canada's cherished image as a tolerant society leads even the most progressive people to adopt the belief that racism is comprised of only overt acts. However, what is not acknowledged by this old-fashioned view of prejudice is that the nature and expression of prejudice has evolved into a more covert form of prejudice known as modern prejudice (McConahay, 1986). This is particularly important because there is a well documented history of prejudice and discrimination of Aboriginal peoples in Canada, and without a proper understanding of the changing face of prejudice in Canada it is difficult to determine if there in fact has been a reduction in prejudiced attitudes towards Aboriginal peoples in Canada.<p> This study examines the criterion-related validity of the Prejudice Attitudes Towards Aboriginals Scale (PATAS) (Morrison, 2007) a 25 item (11 old-fashioned prejudice items and 14 modern prejudice items) newly developed measure of prejudicial attitudes towards Aboriginals developed using the theory of Modern Prejudice (McConahay, 1986). Four hundred and five undergraduate students completed a questionnaire including the PATAS, Right-wing Authoritarianism scale (RWA scale) (Altemeyer, 2007), Social Dominance Orientation scale (SDO5) (Pratto, Sidanius, Stallworth, and Malle, 1994), Motivation to Control Prejudice Reactions Scale (MCPRS) (Dunton and Fazio, 1997), and Form C of the Marlowe Crowne Social Desirability Scale (Renolds, 1982).<p> The results of this investigation revealed evidence attesting to the criterion-related validity of the PATAS. Participants who scored high on the PATAS also had high scores on the RWA scale, SDO5 scale, and tended to have a conservative political orientation. However, contrary to expectations, religious self schema was not found to be associated with PATAS scores. Practical applications and limitations of these findings are discussed as are possible directions for future research.

Objectifs : Ce mémoire propose de répertorier par une revue systématique les instruments de mesure clinique des conduites addictives établies et émergentes; de les comparer au moyen d’une grille d’analyse afin de de déterminer si ces conduites sont cohésives au plan conceptuel. Méthode : La stratégie analytique employée s’est déroulée en trois étapes : 1) Via les moteurs de recherche Pubmed, Psychinfo, HAPI et Embase, nous avons cherché, pour l’ensemble des conduites addictives, les questionnaires ayant fait l’objet d’une étude de validation interne au plan psychométrique. 2) Une grille d’analyse a été développée et validée, couvrant 21 paramètres tirés de 4 catégories conceptuelles : les critères diagnostiques de dépendance (DSM-IVTR), le tempérament (Cloninger et Zuckerman), le processus de production du handicap social (Fougeyrollas) et une grille d’analyse cognitivo-comportementale (Beck). 3) tous les instruments ont été analysés et comparés au moyen de cette grille qui a été développée est validée par un accord inter-juge élevé. Résultats : Nous avons répertorié 191 questionnaires répartis sur 21 conduites addictives. On constate que les conduites les plus prévalentes sont également celles pour lesquelles on retrouve le plus grand nombre de questionnaires. Les catégories que les questionnaires évaluent le plus sont celles des critères de la dépendance et l’analyse cognitivo-comportementale, les catégories beaucoup moins bien représentées étant celles du tempérament et du processus de production du handicap social. On note des tendances semblables pour les paramètres entre les questionnaires portant sur la toxicomanie et ceux portant sur les addictions sans drogues. Conclusion : Ce mémoire confirme une cohésion clinique dans la mesure des addictions, tel que déterminé par une grille validée appliquée sur un ensemble exhaustif de questionnaires répertoriés par une revue systématique. / Aims: To conduct a systematic review of instruments for the clinical measurement of established and emerging addictions; and to determine whether these addictive behaviours are similarly conceptualised in clinical research. Methods: The analytic strategy employed comprised three steps: 1) major search engines were used to do an inventory of available psychometrically validated clinical instruments for assessing addictions; 2) an analytical grid was developed and validated, covering 21-parameters related to four conceptual categories: dependence (DSM-IV-TR), temperament (Cloninger and Zuckerman), social handicap (Fougeyrollas), and cognitive behaviour analysis (Beck); 3) all instruments were analysed and compared through the grid. Results: The method yielded 191 questionnaires covering 21 addictive behaviours. The most prevalent behaviours were those best represented in terms of number of questionnaires. The criteria categories most evaluated by the questionnaires were dependence and cognitive behaviour; temperament and social handicap were much less often considered. Patterns were generally similar in terms of parameters, whether questionnaires concerned substance or non-substance addictions. Conclusions: The measurement of addictions appears clinically cohesive, as determined by a validated analysis grid applied to an exhaustive set of questionnaires identified via a systematic literature review.

L’étude présente l’élaboration du premier outil d’évaluation normalisée du langage destiné aux enfants francophones d’âge préscolaire des pays africains qui se caractérisent par l’absence de services publics en orthophonie et la méconnaissance des retards de langage. En s’inspirant des techniques psychométriques langagières utilisées en Amérique du nord et en se basant sur les théories d’acquisition du langage, on a construit un outil appelé Batterie de tests de dépistage approfondi (BATEDA) qui compte onze tests répartis en trois sous-batteries évaluant respectivement l’intégrité des modalités de transmission du langage (BATEM), les composantes langagières (BATEL) et la mémoire verbale (TMV). A partir d’un échantillon de 159 enfants camerounais francophones, on a normalisé la batterie suivant la cote z et les rangs en centile. Les tests présentent une fiabilité inter-juge et intra-juge (p<0,05), une cohérence interne globale d’environ 96% (α de Cronbach=0,958) et une validité prédictive de la réussite scolaire des enfants (r=0,700). Les stratégies d’application de la BATEDA visent à favoriser la pratique du dépistage systématique et la prise en charge des retards de langage au Cameroun, en mettant à contribution les enseignants et les parents comme principaux intervenants. Les implications de cette étude sont de trois ordres : (1) une meilleure connaissance des difficultés langagières, la revalorisation des personnes atteintes et une attitude de vigilance sociale; (2) l’instauration de la pratique de dépistage précoce favorable à l’intervention; (3) une potentielle diminution du taux d’exclusion et d’abandon scolaire d’enfants présentant des retards langagiers à travers un enseignement ciblé en leur faveur. / The study aims at the building of the first normalized language assessment test intended for French-speaking preschoolers living in African countries where language delays are ignored and where there is a lack of public services in speech-language therapy. Being inspired by the format of standardized language tests, and based on language acquisition theories, we developed a tool named Batterie de tests de dépistage approfondi (BATEDA) which combine eleven tests organized in three batteries assessing respectively modalities (BATEM), language components (BATEL) and memory (TMV). From a sample of 159 Cameroonian French-speaking four-to-five-years old children, the tool has been normalized using standard scores technique (the z score and the percentile). Tests have an inter-scorer reliability, an internal consistency of 96% (α de Cronbach=0,958) and a predictive validity of the primary school success of children (r=0,700). The application strategies of BATEDA aim at encouraging the screening of language delays in order to take charge of these difficulties in Cameroon by implicating teachers and parents as main participants. Among the implications of this study, we have the better knowledge of difficulties related to language delays, the better consideration of children affected, the establishment of early screening and language assessment on behalf of intervention, and a potential decrease of the rate of school abandon and expulsion of children with language delays.

We often form intentions but have to postpone them until the appropriate situation for retrieval and execution has come, an ability also referred to as event-based prospective memory. After intention completion, our cognitive system has to deactivate no-more-relevant intention representations from memory to avoid interference with subsequent tasks. In everyday life, we frequently rely on these abilities also in stressful situations. Surprisingly, little is known about potential stress effects on these functions. Therefore, the present study aimed to examine the reliability of event-based prospective memory and of intention deactivation in conditions of acute psychosocial stress. To this aim, eighty-two participants underwent the Trier Social Stress Test, a standardized stress protocol, or a standardized control situation. Following this treatment, participants performed a computerized event-based prospective memory task with non-salient and focal prospective memory cues in order to assess prospective memory performance and deactivation of completed intentions. Although the stress group showed elevated levels of salivary cortisol as marker of a stress-related increase in hypothalamus-pituitary-adrenal axis activity throughout the cognitive testing period compared to the no-stress group, prospective memory performance and deactivation of completed intentions did not differ between groups. Findings indicate that cognitive control processes subserving intention retrieval and deactivation after completion may be mostly preserved even under conditions of acute stress.

Thesis (M.S.)--Uniformed Services University of the Health Sciences, 2005. / Typescript (photocopy).

Thesis (Ph. D.)--Uniformed Services University of the Health Sciences, 2005. / Typescript (photocopy).

Mental toughness is accepted to be an important component of sporting performance, especially so in the domain of cricket. It has been called many names, such as Big Match Temperament, bottle, and mettle and it is widely believed that it plays a role in how successful a cricketer may be, although very difficult to define and explain. James Loehr described it as one’s ability to consistently perform to the upper limit of your talent and skill and numerous researchers have since tried to define the construct based on more empirical research. This research project consists of three articles on mental toughness. The first focuses on the consideration of extra-personal influences on the development and implementation of mental toughness programmes. The second focuses on examining the psychometric properties of the paper-and-pencil versions of the Sports Mental Toughness Questionnaire (SMTQ) and the Psychological Performance Inventory-Alternative (PPI-A). The third examines the differences in the demographic characteristics of a sample of cricketers on the online versions of the SMTQ and the PPI-A. The results suggest that extra-personal influences are exceptionally important in the development and implementation of mental toughness programmes for school level cricketers, especially motivational climate and social support. While the PPI-A and the SMTQ displayed some promising psychometric properties in the current study, researchers should apply these mental toughness inventories with circumspection, taking into account questions regarding dimensionality, item formulation and variation in sample characteristics (e.g., age and sporting code), until more research can be conducted using these inventories with larger and more varied samples and the understanding of the mental toughness construct improves. The examination of the demographic differences on scores of the SMTQ and PPI-A revealed inconclusive results on age, sex, and ethnicity, while competitive level was the only distinguishing characteristic in which respondents at high levels produced higher mental toughness scores. The three studies comprising this “by articles” format PHD dissertation will be referred to as Article 1, Article 2, and Article 3 and can be found in Chapters, 2, 3, and 4 respectively. / Psychology / D.Phil. (Psychology)

Legal and scientific imperatives necessitate the validation of a psychometric battery before using it for the purposes of personnel selection and decision- making. The aim of this investigation is to validate a selection battery, i.e. the Ability, Processing of Information and Learning (APIL) Battery and Raven's Advanced Progressive Matrices (APM), used in selecting university bridging - course students. The empirical study is informed by a literature review focussing on the legal and scientific parameters of psychometrics within selection, the conceptualisation of intelligence and its relationship to academic performance. Hypotheses are posed regarding the predictive power of the selection battery and the effect of biographical factors on academic performance. Results indicate that the APU. Battery apd Raven's APM are both valid predictors of academic performance, ·although the former appears more effective. This investigation emphasises the influence of moderating factors, i.e. factors other than cognitive ability, on academic performance. / Industrial and Organisational Psychology / M. Adm. (Industrial and Organisational Psychology)