The purpose of this study was to determine if there was a significant relationship between scores on the Extraversion and Neuroticism scales of the Eysenck Personality Inventory and the academic achievement and attrition of freshman students in the Ball State University College of Architecture and Planning for academic year 1974-75. The study also attempted to determine whether the addition of Extraversion and Neuroticism scores to the objective admission criteria presently used by the University would add significantly to the predictability of achievement and attrition.The sample used in this study consisted of 76 students beginning their freshman year in the College of Architecture and Planning in the Fall Quarter of 1974. The students were administered the Eysenck Personality Inventory on their first day on campus together. At the end of Spring Quarter, 1975, grade point averages were compiled. Twenty-one of the original 76 students in the sample had dropped out of the Architecture and Planning program.Multiple linear regression equations were used to ascertain the degree of correlation between Extraversion and academic achievement as well as to determine whether the addition of Extraversion to the objective criteria used by the University would significantly increase the accuracy of prediction of academic achievement and attrition of the sample. The relationship between Neuroticism and academic achievement was tested using a polynomial regression equation and the coefficient of curvilinear correlation. The relationship between Neuroticism and attrition was presented in a scattergram.The following conclusions regarding the relationship between the Eysenckian variables Extraversion and Neuroticism and the academic achievement and attrition of the sample were drawn from the research data:1. There was no significant correlation between Extraversion scores and the academic achievement of the sample in coursework within the College of Architecture and Planning.2. There was no significant correlation between Extraversion and the overall University academic achievement in the sample.3. There was no significant correlation between Extraversion and attrition of the sample.4. Extraversion did not add to the predictability of achievement or attrition which was obtainable from the criteria presently used by the University to screen applicants for admission to the College of Architecture and Planning.5. There was no significant correlation between prior college experience and attrition of the sample.6. There was no significant linear or curvilinear relationship between Neuroticism and the academic achievement or attrition of the sample. It was found to have no value at all as a predictor for the sample. In the literature reviewed, the majority of the research studies on the relationship between Neuroticism and academic achievement reported a curvilinear relationship between the two, with moderately high scores on the Neuroticism scale of the Eysenck Personality Inventory being considered optimal for high academic achievement. The results of the present study on not conform to these findings; no relationship was found between Neuroticism and the achievement and attrition of the sample.

The purpose of this study was to investigate the relationship between Eysenckian personality variables and ratings of job performance and promotion potential of a group of police officers.In order to identify differences in levels of extraversion, neuroticism and intelligence, subjects were evaluated with the Eysenck Personality Inventory (EPI) and the Primary Mental Abilities Test (PMA). The EPI was used to measure differences in extraversion and neuroticism. Two PRA sub-tests, Verbal Meaning and Number Facility, were administered to each subject under both "unstressed" and "stressed" conditions. This test-retest procedure was devised to assess problem-solving abilities under varying conditions of stress and motivation.The subjects for this study were drawn from an East-Central Indiana city police department. Thirty-three patrolmen volunteered to Participate in the study. These men were members of a 50 man group which had been designated as (1) having two or more years experience with their department and (2) were currently working in positions requiring the wearing of a standard police uniform. The subjects ranged in age from 2L to 64 with a mean age of 32.9 years.Data for each subject submitted for statistical treatment included extraversion and neuroticism as measured by the EPI. Four experimental cognitive variables derived from comparisons between "unstressed" and stressed" test performance on two PMA sub-tests were also submitted. These "Stress Gain" scores represented the increase in level of difficulty attained, and the increase in speed of solution, resulting from increased stress and motivation. Two other experimental variables, "Stressed Raw Scores", were used to represent the level of difficulty attained on both PMA sub-tests under stressful test conditions. Composite standardized ratings of job performance and promotion potential obtained from three senior supervisors' ratings were also submitted for statistical analysis.Statistical treatment to ascertain the relationship between the Eysenckian variables and ratings of job performance and promotion potential included the calculation of: (1) correlation coefficients by the product-moment method for ungrouped data and (2) Fisher Z transformations for testing the significance of the computed product-moment correlations. An adjusted reliability index was derived for the job performance and promotion potential ratings through a one-way analysis of variance.Sixteen research hypotheses were formulated and tested in the study. The degree of significance necessary to reject the null hypotheses that Eysenckian personality variables were uncorrelated with ratings of job performance and promotion potential was set at the .05 level. In order to attain a practical significance a correlation of +.40 was required.The group means obtained on the EPI were 11.8 for extraversion (SD=3.5) and 7.9 for neuroticism (SD=4.5). This mean neuroticism score represents a lower mean level of neuroticism for a group than any other group reported in the EPI manual. These scores placed the sample group in the "stable introvert" quadrant of Eysenck's categorical framework.Product-moment correlations between the Eysenckian variables and job performance ratings ranged from -0.222 to 0.0575, and correlations between the Eysenckian variables and ratings of promotion potential ranged from -0.273 to 0.217. These coefficients were all found to be statistically insignificant.The adjusted reliability indices of .72 for job performance ratings and .56 for promotion potential ratings indicated that the ratings used for the study lacked adequate reliability. Analysis of the means and standard deviations of the ratings suggested that errors of leniency and central tendency had occurred.Further analysis of data revealed a coefficient of 0.29 (p<.05) existed between extraversion and Stress-Gain Time (Verbal), and a coefficient of -0.33 (p<.05) between neuroticism and Stressed Raw Verbal Scores.While it was found that there is no support for a relationship between Eysenckian personality variables and rated performance and promotion potential within the group studied, it was suggested that the dimensions of extraversion and neuroticism can interact with intelligence to effect problem-solving behavior. Recommendations for further research were made.

Submitted by Beatriz_ Estagiaria (marcianb@ig.com.br) on 2012-01-27T14:09:11Z No. of bitstreams: 1 000039634.pdf: 2487356 bytes, checksum: 8c4ee899887e8bd18a24a632b813878a (MD5) / Made available in DSpace on 2012-01-27T14:09:48Z (GMT). No. of bitstreams: 1 000039634.pdf: 2487356 bytes, checksum: 8c4ee899887e8bd18a24a632b813878a (MD5) / The aim of the experimental work described in this dissertation was the study of m Brazilian adaptation of Eysenck's Maudsley Personality Inventory regarding introversion-extraversion dimension. The Brazilian version by Professor Riva Bauzer was twice administered to 70 students of four of our classes of psychology at the Colégio Batista Shepard. Besides this, to the same students a questionnaire was administered in which we asked to each pupil to give his subjective evaluation of the degree of extraversion present in each of his classmates. We were thus enabled to evaluate experimetally: a) the reliability coefficient of the questionnaire; b) the reliabiliy coefficient of the Brazilian version of the Maudsley Personality Inventory; c) the validity coefficient of the Maudsley Personality Inventory, taking the questionnaire as a criterion. Our work was not limited to this. The discriminating ability of each item of the Maudsley Personality Inventory was determined by means of the biserial correlation coefficient. together with the percentage of responses indicative of extraversion. The various experimental data now available open the way to further research aimed at the improvement of the Brazilian version of the Maudsley Personality Inventory. / O propósito dos trabalhos experimentais expostos na presente dissertação foi o de estudar a versão brasileira do Maudaley Personality Inventory. de Eysench. no que diz respeito à sua dimensão bipolar introversão-extroversão. A adaptação brasileira (devida à Professora Riva Bauzer) foi aplicada por duas vezes a 70 estudantes, de quatro turmas do Colégio Batista Shepard, que são nossos alunos de psicologia. Paralelamente a esta aplicação, foi aplicado por duas vezes sucessivas, aos mesmos alunos, um questionário por nós organizado. Nele era pedida a cada um uma avaliação subjetiva do grau de introversão-extroversão dos respectivos colegas de classe. Desse modo tivemos a possibilidade de avaliar: a) o coeficiente de precisão do questionário; b) o coeficiente de precisão do Maudeley Personality Inventory; c) o coeficiente de validade do Maudaley Persona lity Inventory, tomando o questionário como critério de validação. Entretanto, nao terminaram ai nossos trabalhos. Por meio do coeficiente de correlação bisserial, foi estimado o poder discriminante de cada uma das questões do Maudsley Personality Inventory, assim como seu grau de 'popularidade'. Esta é uma denominação por nós atribuida à porcentagem de sujeitos que assinalaram a questão no sentido de extroversão. Estes elementos abrem caminho para a realização de pesquisas ulteriores com a finalidade de aperfeiçoar a versão brasileira do Maudsley Personality Inventory.

This study aimed to determine if Junior Eysenck Personality Inventory (JEPI) scores would differentiate between youth with and without PTSD. More specifically, the study compared JEPI Neuroticism and Extraversion scores across youth with PTSD, trauma exposed youth without PTSD, and non-traumatized youth using a three group case control design. The Children’s PTSD Inventory and unstructured DSM-IV based diagnostic interviews were utilized to determine diagnostic status. Given that prior research has indicated a relationship between neuroticism and internalizing disorders, and as PTSD is primarily an internalizing disorder, it was expected that youth with PTSD would have higher JEPI Neuroticism scores relative to trauma exposed youth without PTSD or case controls. It was further expected that JEPI Neuroticism scores of trauma exposed youth without PTSD and control subjects would not significantly differ. Finally, it was expected that JEPI Extraversion scores would not significantly differ between groups. As expected, youth with PTSD had significantly higher Neuroticism scores relative to traumatized youth without PTSD and controls. The Neuroticism scores of trauma exposed youth without PTSD and controls did not significantly differ. There were no significant differences between groups in regard to Extraversion scores. Implications for research and practice were considered.