Chronic major depressive disorder (CMDD) is a common and debilitating illness. Its pathophysiology needs further elucidation, before more effective targeted treatments can be developed for this condition. To gain a better understanding of the psychobiology of CMDD, three interconnected studies were conducted that examined the interplay between chronic depression, cortisol responses, and personality. Study 1 examined cortisol responses to the Trier Social Stress Test (TSST) in CMDD participants (n=29) as compared to healthy controls (n=28). It was hypothesized that cortisol responses would be greater in the CMDD population. Results indicated that females with CMDD had increased cortisol output compared to female controls, a pattern consistent with the hypothesis. However, males with CMDD had decreased cortisol responses compared to male controls. These results suggest that cortisol responses to social stress are altered in those with CMDD; however, females and males experience fundamentally different changes. Study 2 examined moderating effects of personality on cortisol responses to the TSST in those with CMDD (n=51) as compared to healthy controls (n=57). It was hypothesized that higher neuroticism and/or lower extraversion would be associated with increased cortisol responses in CMDD participants. As hypothesized, lower extraversion was associated with increased cortisol reactivity in those with CMDD but not in healthy controls. However, no association was found between neuroticism and cortisol responses. These findings could support the notion that lower extraversion is a vulnerability marker for chronic depression and thus a possible target for treatment. Study 3, evaluated the cortisol awakening response (CAR) in CMDD participants (n=27) compared to healthy controls (n=30). It was hypothesized that such awakening responses would be more pronounced in the depressed population compared to controls. Contrary to expectation, no differences were found between the groups. However, lower extraversion was associated with a lower CAR in both CMDD and healthy controls, a finding that was not anticipated a priori. These interconnected studies suggest that examining relationships between depression, cortisol responses, and personality, can assist with identifying distinct psychobiological profiles in those with chronic depression. It is proposed that this strategy will improve the likelihood of developing more targeted treatments for this population.

This study sought to investigate solitude as a phenomenon. People’s affinity for solitude and the antecedents of affinity for solitude were of crucial interest to the study because affinity for solitude has been considered a strong determinant of solitude behavior. Based on the review of existing solitude studies, major constructs believed to comprise an empirical model were theoretically and operationally defined: affinity for solitude, general attitudes toward solitude, subjective norms, perceived control, extraversion, intended solitude behavior, and actual solitude behavior. The relationships among latent factors were hypothesized for empirical tests. A questionnaire was designed to measure the above constructs. Several items were based on previous studies although several items were developed by the investigator. A total of 395 college students, 162 male and 233 female students completed an online survey in exchange for extra credit. Preliminary analysis indicated the internal consistency of the battery of measurement scales used in this study were highly reliable; the measurement test also provided empirical evidence of the construct validity of the developed measures. A test of the hypothesized model of people’s affinity for solitude revealed that there were well-defined path relationships between latent factors with a good fit between the measures and the sample data. Findings revealed that general attitudes toward solitude and subjective norms positively contributed to affinity for solitude; while extraversion negatively influenced affinity for solitude. Affinity for solitude effectively predicted intended solitude behavior and actual solitude behavior. Additionally, the study found that subjective norms and general attitudes toward solitude also significantly predicted intended solitude behavior. A model of people’s affinity for solitude and solitude behavior allowed us to analytically view the latent social and cognitive factors that significantly inform people’s affinity for solitude and their solitude behavior. This study is valuable in two ways. First, theoretical and empirical approaches derived from this current study suggest ways of conceptualizing solitude attitudes and behavior. Second, study findings account for the antecedents and consequences of affinity for solitude. Theoretical relations and several implications associated with college students and recreation management were presented. Additionally, the limitations of the study followed by suggestions for improvements and possible directions for future research were discussed.

Thesis (Ed. D.)--University of Toronto, 2007. / Source: Dissertation Abstracts International, Volume: 68-06, Section: A, page: 2293. Includes bibliographical references (leaves 141-160).

Thèses (M.A.)--Université de Sherbrooke (Canada), 2000. / Titre de l'écran-titre (visionné le 20 juin 2006). Publié aussi en version papier.

abstract: Crowding and satisfaction remain widely studied concepts among those seeking to understand quality visitor experiences. One area of interest in this study is how the order of crowding and satisfaction items on a survey affects their measurement levels. An additional area of interest is the influence of personality traits on experience-use-history, crowding, and satisfaction. This study used two versions of a survey: A) crowding measured prior to satisfaction and B) satisfaction measured prior to crowding, to explore the influence of item order on crowding and satisfaction levels. Additionally, the study explored the influence of personality traits (extraversion and neuroticism) and experience use history (EUH) on crowding and satisfaction. EUH was included as a variable of interest given previous empirical evidence of its influence on crowding and satisfaction. Data were obtained from an onsite self-administered questionnaire distributed to day use visitors at a 16,000 acre desert landscape municipal park in Arizona. A total of 619 completed questionnaires (equally distributed between the two survey versions) were obtained. The resulting response rate was 80%. One-way ANOVA's indicated significant differences in crowding and satisfaction levels with both crowding and satisfaction levels being higher for survey version B. Path analysis was used to test the influence of personality traits and EUH on crowding and satisfaction. Two models, one for each version of the survey were developed using AMOS 5. The first model was tested using data in which crowding was measured prior to satisfaction. The second model relied on data in which satisfaction was measured prior to crowding. Results indicated that personality traits influenced crowding and satisfaction. Specifically, in the first model, significant relationships were observed between neuroticism and crowding, neuroticism and EUH, EUH and crowding, and between crowding and satisfaction. In the second model, significant relationships were observed between extraversion and crowding, extraversion and satisfaction, and between EUH and satisfaction. Findings suggest crowding and satisfaction item order have a potential to influence their measurement. Additionally, results indicate that personality traits potentially influence visitor experience evaluation. Implications of these findings are discussed. / Dissertation/Thesis / M.S. Recreation and Tourism Studies 2011

Esse projeto visou a construção, validação e normatização de escalas para a avaliação dos Fatores Extroversão e Socialização no modelo dos Cinco Grandes Fatores de Personalidade. A partir deste Modelo, Socialização é uma dimensão da personalidade que agrupa traços como altruísmo, franqueza, confiança nas pessoas, bem como frieza, falta de empatia, comportamentos antisociais, etc. Extroversão engloba traços que descrevem nível de comunicação, assertividade, gregariedade, busca por diversão, etc. A validade de construto da Escala Fatorial de Socialização (EFS) e Escala Fatorial de Extroversão (EFE) foi realizada a partir de amostras independentes compostas por aproximadamente 1.100 pessoas de cinco estados brasileiros, de ambos os sexos, com nível de escolarização médio ou superior. Foram realizadas análises fatoriais para a verificação da dimensionalidade da EFS, sendo que a solução de três fatores foi considerada a mais adequada. Os fatores extraídos foram denominados Amabilidade, Pró-sociabilidade e Confiança nas pessoas, com Alpha’s de 0,91; 0,84 e 0,80 respectivamente. A escala geral apresentou uma consistência interna de 0,92. Foram realizadas análises fatoriais para a verificação da dimensionalidade da EFE, sendo que a solução de quatro fatores foi considerada a mais adequada. Os fatores extraídos foram denominados Comunicação, Altivez, Assertividade, Interação Social, com Alpha’s de 0,90; 0,78; 0,78 e 0,83 respectivamente. A escala geral apresentou uma consistência interna de 0,91. / The present project aimed the development, validation and standardization of scales to measure Extraversion and Agreeableness in the Five Factor Model of Personality. In this model, Agreeableness is comprised by traits that describe altruism, straightforwardness, trust in people, as well as coldness, antisocial behavior, among others. Extraversion includes traits that describe level of communication, assertivity, gregariousness, search for pleasure, among others. The participants in the construct validity study of the Agreeableness Factorial Scale (EFS) and Extraversion Factorial Scale (EFE) were approximately 1.100 individuals, from five States in Brazil, of both sexes, with high school or university level of education. Factor analyses were conducted to determine the EFS dimensions. A 3-factor solution was found to be more adequate. The factors found were named: Amiableness, Pro-social behavior, and Trust. Cronbach’s alphas were .91, .84, and .80 respectively. The general scale presented an internal consistency level of .92. Factor analyses were also conducted to verify the EFE dimensions. A 4-factor solution was found to be more adequate. The factors found were named: Communication, Pride, Assertiveness, and Social Interaction. Cronbach’s alphas were .90, .78, .78, and .83 respectively. The general scale presented internal consistency level of .91.

Effects of neuroticism, agreeableness, extraversion, conscientiousness in online are affecting consumer impulse buying behavior are important to explore because it directly impacts the consumers individually. The objective of this study is to find out the role of demographics and personality traits of a consumer in shaping their online impulse buying behavior. This study will also will evaluate the moderating effect of hedonic shopping in impulse buying behavior of consumers. Quantitative research approach has been used by using survey method and data was collected through adapted questionnaires. The sample of the study was consisted of 200 respondents from different cities of Sweden and response rate was 80%. IBM SPSS data editor was used to conduct data analysis. Multiple linear regression and analysis of variance (ANOVA) with LSD technique was performed to test the proposed hypothesis. Based on the empirical analysis, it is been concluded that personality traits i.e. Neuroticism and Agreeableness have negative and significant relationship online impulse buying behavior. More a person possesses the characteristics of Neuroticism and Agreeableness less will be the online impulsive buying. Furthermore, Openness to Change, Conscientiousness, and Extraversion have positive and significant relationship with online impulsive buying behavior. Results also depict that hedonic motivation moderates the relationship of personality traits and online impulsive buying which implies that the pleasure of online shopping boosts online impulsive buying.

Esse projeto visou a construção, validação e normatização de escalas para a avaliação dos Fatores Extroversão e Socialização no modelo dos Cinco Grandes Fatores de Personalidade. A partir deste Modelo, Socialização é uma dimensão da personalidade que agrupa traços como altruísmo, franqueza, confiança nas pessoas, bem como frieza, falta de empatia, comportamentos antisociais, etc. Extroversão engloba traços que descrevem nível de comunicação, assertividade, gregariedade, busca por diversão, etc. A validade de construto da Escala Fatorial de Socialização (EFS) e Escala Fatorial de Extroversão (EFE) foi realizada a partir de amostras independentes compostas por aproximadamente 1.100 pessoas de cinco estados brasileiros, de ambos os sexos, com nível de escolarização médio ou superior. Foram realizadas análises fatoriais para a verificação da dimensionalidade da EFS, sendo que a solução de três fatores foi considerada a mais adequada. Os fatores extraídos foram denominados Amabilidade, Pró-sociabilidade e Confiança nas pessoas, com Alpha’s de 0,91; 0,84 e 0,80 respectivamente. A escala geral apresentou uma consistência interna de 0,92. Foram realizadas análises fatoriais para a verificação da dimensionalidade da EFE, sendo que a solução de quatro fatores foi considerada a mais adequada. Os fatores extraídos foram denominados Comunicação, Altivez, Assertividade, Interação Social, com Alpha’s de 0,90; 0,78; 0,78 e 0,83 respectivamente. A escala geral apresentou uma consistência interna de 0,91. / The present project aimed the development, validation and standardization of scales to measure Extraversion and Agreeableness in the Five Factor Model of Personality. In this model, Agreeableness is comprised by traits that describe altruism, straightforwardness, trust in people, as well as coldness, antisocial behavior, among others. Extraversion includes traits that describe level of communication, assertivity, gregariousness, search for pleasure, among others. The participants in the construct validity study of the Agreeableness Factorial Scale (EFS) and Extraversion Factorial Scale (EFE) were approximately 1.100 individuals, from five States in Brazil, of both sexes, with high school or university level of education. Factor analyses were conducted to determine the EFS dimensions. A 3-factor solution was found to be more adequate. The factors found were named: Amiableness, Pro-social behavior, and Trust. Cronbach’s alphas were .91, .84, and .80 respectively. The general scale presented an internal consistency level of .92. Factor analyses were also conducted to verify the EFE dimensions. A 4-factor solution was found to be more adequate. The factors found were named: Communication, Pride, Assertiveness, and Social Interaction. Cronbach’s alphas were .90, .78, .78, and .83 respectively. The general scale presented internal consistency level of .91.

abstract: The notion that a singer’s voice is an expression of their personality serves as the catalyst for an examination of the relationship between the continuum of introversion and extraversion, and the pathologies of muscle tension dysphonia, vocal nodules, and performance anxiety. This paper begins with a brief introduction defining extraversion and introversion, followed by a review of personality studies identifying opera singers as primarily extraverted. Definitions of vocal nodules and muscle tension dysphonia are then given along with a list of recommended therapies. These elements tie in with two studies in speech pathology that suggest that behaviors of extraversion contribute to the development of vocal nodules, and behaviors of introversion contribute to muscle tension dysphonia and a higher laryngeal placement. Performance anxiety is shown to compound the behaviors that lead to vocal pathologies in singers. Additional therapies are recommended to address anxiety management in vocal lessons. Finally, since personality factors that contribute to vocal pathology are psychological, it is recommended that voice teachers refer their students to a psychotherapist for proper treatment. / Dissertation/Thesis / Doctoral Dissertation Music 2017

This diploma thesis deals with the self-concept of children in the class which have the specific diseases of learning. These kids are in their pre-adolescent age (12-15 years). The first part of the thesis gives the definitions related to the discussed topic and these defined terms aim to offer basic information to the reader about the issue. The next part reflects the research itself which aspires to find out and compare the self-concept of children with the specific learning disorder with children who were not diagnosed with this disease. The standardized tests were used for the research which allowed to find out the level of extroversion, introversion and neuroticism in case of children and also, these research were used to find out whether there is an effort for desiderabiltiy, and further such child´s positiion among other kids, his imagination of learning skills and abilities in different subject; i.e. whether the types of specific learning disorder can negatively influence mental stability of the child and whether these have a contribution in relation to his possible neurotic development.