<p>The aim of the present thesis was to study sex differences in memory and other cognitive bilities in healthy adults. In Study I, participants performed a number of episodic memory tasks that were more or less verbal in nature. Results showed that women performed on a higher level than did men in the episodic memory tasks where it was possible to use verbal labels, whereas men performed on a higher level than did women in a visuospatial episodic memory task. In Study II, women’s advantage in face recognition was investigated.Results showed that women performed at a higher level than did men only in the recognition of other women’s faces. In Study III, sex differences in cognitive tasks as well as brain measures were investigated in healthy older adults. Results showed that only the sex differences in a motor task could, to some extent, be explained by sex differences in one of the brain measures. The findings, as well as possible explanations for these patterns of results, are discussed in a theoretical context.</p>

The purpose of this study was to compare student scores on geographic skills in the experimental group with student scores on geographic skills in the control group after adjustment was made in teaching methods and learning materials for verbal and spatial ability for students in the experimental group. Hypotheses tested at the .05 level were as follows. 1. Females would score higher than males on a criterion measure of verbal ability. 2. Males would score higher than females on a criterion measure of spatial ability. 3. Experimental/verbal students would score higher on a geography skills posttest. 4. Experimental/spatial students would score higher on a geography skills posttest. 5. The experimental group would score higher than the control group on a geography skills posttest. The sample was 150 high school United States History students in a medium-sized North Texas school district. Analysis of covariance was used to analyze results of the study of six classes after fifteen days of instruction in physical geography concepts. Experimental classes received geographic instruction directed to verbal and spatial abilities; control group classes received traditional geographic instruction which utilized textbook, lecture, and whole-group instruction. Three high schools participated in the study. Conclusions were that males and females did not differ significantly on verbal and spatial abilities. Values between pretest and posttest for both experimental and control groups were significant, but when adjusted for the covariates of verbal and spatial ability, control/verbal learners' posttest scores were significantly higher than experimental/verbal learners' posttest scores. Spatial/ experimental learners' posttest scores and spatial/control learners' posttest scores were compared, and the result was no significant difference when cell means were adjusted for the higher spatial/experimental learners' spatial ability. The practice of teaching geography through the use of textbook and whole-group instruction resulted in larger learning gains than the practice of using different materials directed toward different learning styles within the same classroom and with no textbook.

M.A., Faculty of Humanities, University of the University, 2011 / With the increasing prevalence of autism on a worldwide scale, new teaching methodologies need to be explored in order to educate children with autism helping them to achieve their maximum potential. It has previously been established that many individuals with autism use visual opposed to verbal modes of thinking and learning. In this study action research was used to examine if high imagery instructional methods of teaching could be used as a teaching tool for autistic children attending a special needs school. This study examined whether there was a change in the classroom performance of three autistic children after a 5 month period of high imagery instruction, as compared against a baseline of response to previous instruction, as well as the pattern of verbal and non verbal abilities manifested at time of intake into the programme. Analysis of the results of initial cognitive, language and perceptual tests was thus undertaken for diagnostic purposes, combined with analysis of initial response to teaching prior to high imagery intervention. Once this base-line had been established, analysis of school readiness and scholastic tests was then undertaken pre and post intervention, combined with in-depth interviews with the children’s teacher, analysis of developmental diaries and analysis of work done as part of the school programme followed by each child over a five month period of intervention. At baseline all three children were found to have phonological weaknesses, as evidenced by difficulties isolating onset sounds in words, difficulties with rhyming and difficulties in skills such as blending sounds into words. Two of the children in the sample showed little to no response to the high imagery instruction, and continued to have difficulties with reading and pre-reading tasks involving working with the sound structure of the English language. The third child in the sample showed an increase in phonological skills and in reading, writing and spelling abilities in response to high imagery instruction, as well as an increase in both vocabulary and the non-verbal abilities involved in drawing . It was noted at base-line as well as throughout the study that visual memory was an area of strength for this child, but not for the other two children in the sample. The child who made progress was also able to use his visual strengths to develop associations between sounds and letters. The conclusions from this exploratory study are that not all children with autism learn through use of visual strategies in teaching. The success of high imagery teaching strategies when used with a child with well developed visual memory abilities would suggest that high imagery instruction could be a useful and successful teaching strategy where children with autism exhibit well developed visual modes of thought. Strengths in visual memory and in visual association may be indicators of the likelihood that a child with autism will respond positively to high imagery instruction.

The aim of the present thesis was to study sex differences in memory and other cognitive bilities in healthy adults. In Study I, participants performed a number of episodic memory tasks that were more or less verbal in nature. Results showed that women performed on a higher level than did men in the episodic memory tasks where it was possible to use verbal labels, whereas men performed on a higher level than did women in a visuospatial episodic memory task. In Study II, women’s advantage in face recognition was investigated.Results showed that women performed at a higher level than did men only in the recognition of other women’s faces. In Study III, sex differences in cognitive tasks as well as brain measures were investigated in healthy older adults. Results showed that only the sex differences in a motor task could, to some extent, be explained by sex differences in one of the brain measures. The findings, as well as possible explanations for these patterns of results, are discussed in a theoretical context.

Cette thèse par articles étudie les origines de la sophistication politique. Les chapitres un, deux et trois étudient l'impact d'une série de variables sur les connaissances politiques tandis que le chapitre quatre examine l'impact des connaissances politiques sur la façon dont les individus mettent à jour leurs opinions. Le premier article explore les effets de l'éducation collégiale, l'intérêt politique et les capacités cognitives sur le développement des connaissances politiques. Nous montrons que l'enseignement collégial général a un impact relativement petit sur le développement des connaissances politiques, mais l'enseignement collégial en sciences sociales et humaines a un impact positif sur la connaissance politique, mettant en évidence un effet substantiel de l'éducation. De plus, nous démontrons que les habiletés cognitives déterminent le niveau de connaissances générales, tandis que l'intérêt politique et l'éducation affectent également la variation des connaissances politiques au fil du temps. Le deuxième article étudie l'impact des aptitudes verbales à l'âge de cinq ans sur trois indicateurs importants de la sophistication politique: les connaissances politiques à 16 ans, ainsi que l'intérêt politique et la participation à 30 ans. Il est démontré que les aptitudes verbales à l'âge de 5 ans ont un impact fort et non linéaire sur les connaissances politiques à 16 ans, et l'intérêt politique à 30 ans, tandis que leur impact sur la participation future est fort et linéaire. Enfin, l'impact des variables parentales sur les connaissances politiques est considérablement réduit lorsque les compétences verbales précoces sont prises en compte. Le troisième article examine l'impact de l'ouverture aux expériences sur la sophistication politique. Il est soutenu que c'est l'intellectualisme qui explique la relation trouvée entre l'ouverture et l'information politique dans les recherches passées et que les nouvelles recherches utilisant le Ten Item Personality Inventory (TIPI) ne devraient pas reproduire ce résultat. L'article soutient que c'est parce que l'échelle TIPI évalue l'aspect esthétique de l'ouverture et est mal adapté pour capturer sa composante intellectuelle. Il est également démontré que l'impact de l'intellectualisme en tant que trait de personnalité tient aussi lorsque les habiletés cognitives sont prises en compte. Le dernier article a deux objectifs. Le premier est de considérer l'impact des connaissances politiques sur les perceptions du biais médiatique. Le second est d'étendre la recherche sur les perceptions des biais médiatiques à un électorat non américain. Nous constatons que, comme c'est le cas aux États-Unis, les conservateurs sont plus enclins à croire en l'existence de biais médiatiques. Il est également démontré que les citoyens les plus informés sont plus susceptibles de penser que les médias sont biaisés, mais ils ne sont pas plus susceptibles de percevoir ces biais lorsqu'ils ne sont pas d'accord avec un journaliste. Par conséquent, il appert que les citoyens plus informés ne sont pas plus susceptibles de faire montre de raisonnement motivé. / This thesis by articles investigates the origins of political sophistication. Chapters one, two, and three investigate the impact of a series of variables on political knowledge, while Chapter four looks at the impact of political knowledge on how individuals update their opinions. The first paper explores the effects of college education, political interest, and cognitive abilities on the development of political knowledge. It is shown that general college education has a minimal impact on political knowledge development, but college education in social sciences and humanities has a positive impact on political knowledge, highlighting a substantive effect of education. Moreover, it is shown that cognitive skills determine one's general knowledge level, while political interest and education also affect political knowledge variation over time. The second paper looks at the impact of early verbal skills on political sophistication. This paper investigates the impact of verbal skills at five years of age on three important indicators of political sophistication: political knowledge at 16, as well as political interest and turnout at 30. It is shown that verbal skills at 5 years of age have a strong and non-linear impact on political knowledge at 16, and political interest at 30, while their impact on future turnout is strong and linear. Finally, the impact of parental variables on political knowledge is significantly reduced when early verbal skills are accounted for. The third article looks at the impact of openness to experience on political sophistication. This paper seeks to investigate this relation by distinguishing two different aspects of openness to experience that are sometimes overlooked: the aesthetic and the intellectual components of openness. It is argued that the latter explains the relation found between openness and political knowledge in past research, and that new research using the Ten-Item Personality Inventory (TIPI) should not be expected to replicate this finding. The paper argues that this is because the TIPI scale assesses the aesthetic aspect of openness and is ill suited to capture its intellectual component. It is also shown that the impact of intellectualism as a personality trait also holds when cognitive skills are taken into account. The last paper has two goals. The first is to consider the impact of political knowledge on perceptions of media bias. The second is to extend research on media bias perceptions to a non-American electorate. It is shown that, as found in the US, Conservatives are more prone to believe in the existence of media bias. It is also shown that the most knowledgeable citizens are more likely to think that the media are biased, but they are not more likely to perceive bias when they disagree with a journalist. These results hold true even when a variety of potential confounding factors such as personality traits are taken into account.