Background. Because there have been few studies examining resilience associated with postnatal (PN) depression, this study aimed at formulating and testing a theory-based model integrating both traditional resilience paradigms and non-traditional factors including existential beliefs about life, motherhood and religion. Method. Study hypotheses addressed prediction of PN depression, stress and resilience, and the confounding influence of negative affectivity (neuroticism). Study variables included PN depression (Edinburgh PN Depression Scale, EPDS), stress, neuroticism, self-esteem, mother's distress and ambivalence, purpose/meaning, religious belief, parity, age, marital and social status. They were assessed with standardized self-report instruments and, following a pilot, administered to a probability sample of women four months postpartum in a one-wave, community, postal survey. Because the overall response rate was so low (49%) only the Europeans were included in the study (N = 225; response-rate = 78%). Statistical hypothesis-testing included linear and logistical multivariate model-twilding techniques, and principal components analysis. Results. Sixteen percent scored in the major depression range (EPDS > 12), and 14% in the minor depression range. Depression was associated with stress, neuroticism, purpose/meaning, mother's distress and (marginally) religious belief, but not with self-esteem, mother's ambivalence, age, parity or social class. Although neuroticism was strongly associated with depression, and also overlapped with most psycho-social variables, nonetheless stress, purpose/meaning, and mother's distress maintained significant relationships with depression after neuroticism was statistically controlled. Stress was associated in part with the perception of losing one's freedom in the motherhood role (neuroticism controlled). When resilience was defined as high stress coupled with low depression, it was associated with low levels of neuroticism and mother's distress. When resilience was defined in terms of high levels of maternal satisfaction, it was associated with high purpose and low ambivalence. Principal components analyses revealed that (1) stress scores reflected two dimensions suggestive of distress and self-efficacy; and (2) depression, stress, neuroticism, self-esteem and purpose were markers for the same underlying component, whereas mother's distress and ambivalence were markers for another (unrelated) component. Conclusion. This study underlines the relevance of temperament, self-efficacy, self-transcendence, existential beliefs and motherhood-related cogniitions to the understanding of PN depression and stress. / Subscription resource available via Digital Dissertations only.

Background. Because there have been few studies examining resilience associated with postnatal (PN) depression, this study aimed at formulating and testing a theory-based model integrating both traditional resilience paradigms and non-traditional factors including existential beliefs about life, motherhood and religion. Method. Study hypotheses addressed prediction of PN depression, stress and resilience, and the confounding influence of negative affectivity (neuroticism). Study variables included PN depression (Edinburgh PN Depression Scale, EPDS), stress, neuroticism, self-esteem, mother's distress and ambivalence, purpose/meaning, religious belief, parity, age, marital and social status. They were assessed with standardized self-report instruments and, following a pilot, administered to a probability sample of women four months postpartum in a one-wave, community, postal survey. Because the overall response rate was so low (49%) only the Europeans were included in the study (N = 225; response-rate = 78%). Statistical hypothesis-testing included linear and logistical multivariate model-twilding techniques, and principal components analysis. Results. Sixteen percent scored in the major depression range (EPDS > 12), and 14% in the minor depression range. Depression was associated with stress, neuroticism, purpose/meaning, mother's distress and (marginally) religious belief, but not with self-esteem, mother's ambivalence, age, parity or social class. Although neuroticism was strongly associated with depression, and also overlapped with most psycho-social variables, nonetheless stress, purpose/meaning, and mother's distress maintained significant relationships with depression after neuroticism was statistically controlled. Stress was associated in part with the perception of losing one's freedom in the motherhood role (neuroticism controlled). When resilience was defined as high stress coupled with low depression, it was associated with low levels of neuroticism and mother's distress. When resilience was defined in terms of high levels of maternal satisfaction, it was associated with high purpose and low ambivalence. Principal components analyses revealed that (1) stress scores reflected two dimensions suggestive of distress and self-efficacy; and (2) depression, stress, neuroticism, self-esteem and purpose were markers for the same underlying component, whereas mother's distress and ambivalence were markers for another (unrelated) component. Conclusion. This study underlines the relevance of temperament, self-efficacy, self-transcendence, existential beliefs and motherhood-related cogniitions to the understanding of PN depression and stress. / Subscription resource available via Digital Dissertations only.

Background. Because there have been few studies examining resilience associated with postnatal (PN) depression, this study aimed at formulating and testing a theory-based model integrating both traditional resilience paradigms and non-traditional factors including existential beliefs about life, motherhood and religion. Method. Study hypotheses addressed prediction of PN depression, stress and resilience, and the confounding influence of negative affectivity (neuroticism). Study variables included PN depression (Edinburgh PN Depression Scale, EPDS), stress, neuroticism, self-esteem, mother's distress and ambivalence, purpose/meaning, religious belief, parity, age, marital and social status. They were assessed with standardized self-report instruments and, following a pilot, administered to a probability sample of women four months postpartum in a one-wave, community, postal survey. Because the overall response rate was so low (49%) only the Europeans were included in the study (N = 225; response-rate = 78%). Statistical hypothesis-testing included linear and logistical multivariate model-twilding techniques, and principal components analysis. Results. Sixteen percent scored in the major depression range (EPDS > 12), and 14% in the minor depression range. Depression was associated with stress, neuroticism, purpose/meaning, mother's distress and (marginally) religious belief, but not with self-esteem, mother's ambivalence, age, parity or social class. Although neuroticism was strongly associated with depression, and also overlapped with most psycho-social variables, nonetheless stress, purpose/meaning, and mother's distress maintained significant relationships with depression after neuroticism was statistically controlled. Stress was associated in part with the perception of losing one's freedom in the motherhood role (neuroticism controlled). When resilience was defined as high stress coupled with low depression, it was associated with low levels of neuroticism and mother's distress. When resilience was defined in terms of high levels of maternal satisfaction, it was associated with high purpose and low ambivalence. Principal components analyses revealed that (1) stress scores reflected two dimensions suggestive of distress and self-efficacy; and (2) depression, stress, neuroticism, self-esteem and purpose were markers for the same underlying component, whereas mother's distress and ambivalence were markers for another (unrelated) component. Conclusion. This study underlines the relevance of temperament, self-efficacy, self-transcendence, existential beliefs and motherhood-related cogniitions to the understanding of PN depression and stress. / Subscription resource available via Digital Dissertations only.

Background. Because there have been few studies examining resilience associated with postnatal (PN) depression, this study aimed at formulating and testing a theory-based model integrating both traditional resilience paradigms and non-traditional factors including existential beliefs about life, motherhood and religion. Method. Study hypotheses addressed prediction of PN depression, stress and resilience, and the confounding influence of negative affectivity (neuroticism). Study variables included PN depression (Edinburgh PN Depression Scale, EPDS), stress, neuroticism, self-esteem, mother's distress and ambivalence, purpose/meaning, religious belief, parity, age, marital and social status. They were assessed with standardized self-report instruments and, following a pilot, administered to a probability sample of women four months postpartum in a one-wave, community, postal survey. Because the overall response rate was so low (49%) only the Europeans were included in the study (N = 225; response-rate = 78%). Statistical hypothesis-testing included linear and logistical multivariate model-twilding techniques, and principal components analysis. Results. Sixteen percent scored in the major depression range (EPDS > 12), and 14% in the minor depression range. Depression was associated with stress, neuroticism, purpose/meaning, mother's distress and (marginally) religious belief, but not with self-esteem, mother's ambivalence, age, parity or social class. Although neuroticism was strongly associated with depression, and also overlapped with most psycho-social variables, nonetheless stress, purpose/meaning, and mother's distress maintained significant relationships with depression after neuroticism was statistically controlled. Stress was associated in part with the perception of losing one's freedom in the motherhood role (neuroticism controlled). When resilience was defined as high stress coupled with low depression, it was associated with low levels of neuroticism and mother's distress. When resilience was defined in terms of high levels of maternal satisfaction, it was associated with high purpose and low ambivalence. Principal components analyses revealed that (1) stress scores reflected two dimensions suggestive of distress and self-efficacy; and (2) depression, stress, neuroticism, self-esteem and purpose were markers for the same underlying component, whereas mother's distress and ambivalence were markers for another (unrelated) component. Conclusion. This study underlines the relevance of temperament, self-efficacy, self-transcendence, existential beliefs and motherhood-related cogniitions to the understanding of PN depression and stress. / Subscription resource available via Digital Dissertations only.

Doctor of Philosophy / Department of Family Studies and Human Services / Kristy L. Pederson-Archuleta / Martin C. Seay / This dissertation consists of three studies exploring the relationship between personality and wealth related variables. The psychological type theory was used as the theoretical framework for the first two studies, while the doctrine of interactionism was used in the third study. All three studies utilized data from the 2010 panel of the Health and Retirement Study (HRS). The first study examined the relationship between personality traits and net worth. Linear regression results identified the extroversion and conscientiousness traits as being positively associated with net worth. Furthermore, the agreeableness trait was negatively associated with net worth. The second study explored the relationship between personality preference and stock ownership. This study’s logistic regression results identified the preference for high openness and high neuroticism as significant and positively associated with stock ownership. A high agreeableness preference was significant and negatively associated with stock ownership. The focus of the third study examined how net worth and income mediated the association between personality and life satisfaction. Regression results from this study identified net worth as being a significant mediating variable in the association between the conscientiousness trait and life satisfaction levels. However, income, in addition to net worth, was also a significant mediating variable when the extroversion and neuroticism traits were used to represent personality trait variables. Results from the three studies identified significant associations between personality traits and components of net worth. These findings contribute to the financial planning field by providing useful information in regards to how mental preferences expressed outwardly though personality traits are related to wealth related variables and life satisfaction. Financial planning practitioners can apply these findings to formulate strategies to assist people grow their wealth levels.

Master of Science / Department of Psychology / Ronald G. Downey / Firmly rooted in positive psychology, this study attempted to look beyond discovering the direction or shape of the stress-performance relationship and sought to instead determine the role of personality in this relationship. Although we were unable to test for moderation effects due to multicollinearity issues, we did discover that positive personality characteristics were a significant predictor of performance—even after controlling for experience and self-perceived stress. Interestingly, this relationship occurred in an opposite direction than expected in that higher levels of positive personality characteristics were predictive of lower performance ratings.

Cette thèse porte sur les traits de personnalité associés aux comportements délinquants. De façon plus spécifique, elle s’intéresse à la contribution des traits de personnalité psychopathiques évalués à l’adolescence pour prédire les conduites délinquantes au début de l’âge adulte, lorsque sont également considérés des indices comportementaux. Elle s’inscrit dans le cadre d’une étude longitudinale plus large destinée à décrire les adolescents des Centres jeunesse du Québec. Aux fins de la thèse, un sous-groupe de jeunes, de sexe masculin, a été sélectionné : ces jeunes présentent un trouble des conduites ou ont manifesté des comportements délinquants au cours de l’adolescence. Cette sélection vise à cerner les adolescents les plus susceptibles de présenter des traits psychopathiques, eu égard à la faible prévalence du trouble dans la population générale. Quarante-huit adolescents ont accepté de participer à l'entrevue utilisant la PCL-SV (Psychopathy Checklist Screening Version). Un premier volet de la thèse valide, au Québec, une version française d’une mesure de la psychopathie adaptée à l'adolescence, la PCL-SV. Les indices de fidélité et de validité sont satisfaisants et comparables à ce qui est rapporté avec d’autres versions de la PCL auprès d’adolescents et d’adultes. Les résultats appuient la pertinence de son utilisation auprès des adolescents. Un second volet du projet porte sur la contribution d’une mesure des traits psychopathiques à l’adolescence à la prédiction des conduites délinquantes au début de l’âge adulte. Les traits psychopathiques, tels qu’évalués à l’aide de la PCL-SV, sont un apport significatif aux indices de comportements délinquants dans la prédiction des conduites délinquantes autorapportées deux ans plus tard. Finalement, un dernier volet explore une approche dimensionnelle dans la conceptualisation de la psychopathie, sous l’angle d’un modèle général de la personnalité : le Modèle à cinq facteurs (MCF). Ce volet porte sur la capacité de ce modèle, alternative au modèle catégoriel, à distinguer des jeunes au plan de la gravité de leur délinquance. Les jeunes présentant une délinquance distinctive ont une plus forte propension à rechercher les sensations fortes que ceux dont la délinquance est générale. Les résultats mettent en lumière l’importance d’une composante d’impulsivité comme élément caractéristique d’un sous-groupe de jeunes présentant une délinquance distinctive. L’étude appuie l’utilisation d’un modèle général de la personnalité pour cerner des traits associés à la psychopathie, permettant ainsi d’identifier un noyau dur de délinquants. L’ensemble du projet permet d’établir la valeur ajoutée d’une mesure des traits psychopathiques à l’adolescence pour la prédiction des conduites délinquantes. Il met en lumière l’importance d’une composante d’impulsivité chez les jeunes impliqués dans une délinquance distinctive. C’est l’une des rares études longitudinales s’intéressant à la délinquance autorapportée et à la psychopathie sous l’angle des facettes du MCF chez des adolescents. Il y a une telle hétérogénéité parmi les jeunes délinquants qu’une mesure valide de la psychopathie à l’adolescence permettra une identification plus fiable des jeunes susceptibles de poursuivre leur trajectoire criminelle à l’âge adulte. Les implications cliniques des résultats et les recommandations pour des recherches futures sont reprises dans la conclusion de l’ouvrage. / This thesis is interested in personality traits associated with delinquent behavior. More specifically, it seeks to clarify the contribution of psychopathic personality traits assessed in adolescence to predict antisocials behaviors in early adulthood, when are also considered behavioral indices. It is part of a broader longitudinal study aimed at describing adolescents in the care of Quebec Youth Centres. For research purposes, a subgroup of young males has been selected; those with a conduct disorder or who have exhibited delinquent behaviors during adolescence. The purpose of such a selection was to identify young people who are most likely to have psychopathic traits, given the low prevalence of the disorder in the general population. Forty-eight teenagers have agreed to participate in the interview using the PCL-SV (Psychopathy Checklist Screening Version). A first shutter of the thesis validates, in Quebec, a French version of a measurement of psychopathy adapted for a use with teenagers, the PCL-SV. Results show indices of fidelity and validity satisfactory and comparable with what is brought back with other versions of the PCL used with teenagers and adults. They support the relevance of its use with teenagers. A second part of the dissertation verifies the contribution of psychopathic traits in adolescence to predict antisocial conduct in early adulthood. Results show that psychopathic traits, as measured by the PCL-SV, make a significant contribution above and beyond indices of delinquent behavior to predict self-reported antisocial conduct two years later. Finally, a last chapter explores a dimensional approach in the conceptualization of psychopathy, in terms of a general model of personality: the Five Factor Model (FFM). It seeks to determine its ability to distinguish youths with conduct disorders in terms of the severity of their delinquency. Results show that youths with a serious delinquency have a higher propensity to seek sensations than those whose delinquency is weak. Results highlight the importance of impulsivity as a characteristic element of a subgroup of youths with serious delinquency. The study supports the use of a general model of personality to capture features associated with psychopathy and to identify a hard core of delinquents. The entire project establishes the added-value of a measure of psychopathic traits in adolescence in predicting antisocial behavior. It highlights the importance of a component of impulsivity among youth involved in serious delinquency. This is one of the few longitudinal studies concerned with self-reported delinquency and psychopathy in terms of the facets of the FFM in adolescents. There is such heterogeneity among young offenders; a valid measure of psychopathy in adolescence will allow more specific types and a more reliable identification of young people likely to continue their criminal career into adulthood. Clinical implications of the findings and recommendations for future research are included in the conclusion of the thesis.

Selon plusieurs auteurs, l’intelligence générale et les traits de personnalité sont des construits fondamentaux nécessaires à l’adaptation psychosociale des individus. Bien que plusieurs études menées à partir d’échantillons d’adultes aient démontré des liens significatifs entre ces deux construits, peu d’entre elles ont tenté de vérifier si ces relations pouvaient être observées aussi chez les adolescents. De plus, un nombre très restreint d’études ont étudié la question de savoir si les relations entre l’intelligence générale et les traits de personnalité étaient significatives de façon prospective avec un intervalle de temps entre les évaluations. Enfin, les études disponibles ne permettent pas de déterminer si les relations entre l’intelligence générale et les traits de personnalité sont différentes selon le sexe. La présente étude visait à combler ces vides. Les objectifs étaient, d’une part, de déterminer s’il existe des relations prédictives concurrentes et prospectives entre l’intelligence générale et les traits de personnalité chez les adolescents et, d’autre part, de vérifier si ces relations sont différentes entre les garçons et les filles. Les données utilisées proviennent de l’étude longitudinale de la Stratégie d’intervention agir autrement (SIAA). Un large échantillon d’adolescents évalués une première fois en secondaire un et réévalués à nouveau quatre ans plus tard en secondaire cinq a été employé. À la première vague de collecte de données, seule l’intelligence générale a été évaluée, tandis qu’à la deuxième vague, autant l’intelligence générale que les traits de personnalité l’ont été. La modélisation par équations structurales sur des variables latentes a été utilisée pour tester les différentes hypothèses de recherche. Les résultats ont démontré que, sur le plan concurrent, l’intelligence générale et tous les traits de personnalité considérés sont reliés significativement de façon positive, ce qui va partiellement à l’encontre des données obtenues à partir des échantillons d’adultes. Sur le plan prospectif, les résultats ont confirmé que les corrélations diminuent avec le temps, et ce, pour presque tous les traits étudiés. Finalement, les modèles d’équations structurales multi-groupes ont confirmé la présence de différences significatives entre les garçons et les filles pour certains traits de personnalité. Dans l’ensemble, bien que plusieurs résultats de la présente étude obtenus à partir d’un échantillon d’adolescents soient conformes à ceux observés auprès d’échantillons d’adultes, certaines différences intéressantes sont observées. / According to several scholars, general intelligence and personality traits are fundamental constructs that are necessary for individuals’ psychosocial adjustment. Even though several studies showed significant relations between these constructs in adults’ samples, very few attempted to demonstrate if these relations can be observed in adolescents’ samples. Moreover, very few studies verified if these relations between general intelligence and personality traits were also significant prospectively with a time interval between assessments. Furthermore, the available studies do not allow determining if the relations between general intelligence and personality traits are different across gender. This study aimed at filling these gaps. The objectives were to determine if there were concurrent and prospective relations between general intelligence and personality traits in adolescents, as well as to determine if these relations were different across boys and girls. Data were drawn from the New Approaches New Solutions (NANS) longitudinal study. A large sample of adolescents first assessed in grade one, and re-assessed four years later in grade 5 was used. At the first wave of data collection, only general intelligence was assessed, while at the fifth wave, both general intelligence and personality were assessed. Structural equation modeling on latent variables was used to test the different research hypotheses. The results demonstrated that concurrently, general intelligence and all personality traits considered are significantly positively related, which partially contradict data from adults’ samples. Prospectively, the results confirmed that correlations decreased over time for almost all personality traits. Finally, multiple-group structural equations models confirmed there are significant differences between boys and girls for some personality traits. Overall, despite several results converge with those observed with adults’ samples, some interesting differences can be observed when adolescents are studied.

L’élaboration de programme d’interventions propres aux fraudeurs soulève la question de la particularité de leur personnalité. Des écrits suggèrent que la personnalité des fraudeurs présenterait des similitudes avec les traits psychopathiques. L’objectif de l’étude est donc de décrire et d’explorer ces traits chez des fraudeurs spécialisés incarcérés, et ce, à l’aide des questionnaires Psychopathic Personality Inventory (PPI) et Psychological Inventory of Criminal Thinking Styles (PICTS). Trois groupes de détenus (35 hommes, 17 femmes) ont rempli les questionnaires: fraudeurs spécialisés (n=23), autres délinquants sans crimes violents (ASV, n=19) et autres délinquants avec crimes violents (AAV, n=10). Un groupe d’étudiants (n=430) a aussi complété le PPI, permettant ainsi d’ajouter un groupe de comparaison. Les analyses ont permis de constater que le groupe de fraudeurs diffère peu des autres groupes quant à leurs traits psychopathiques. Cependant, ils sont moins enclins que le groupe d’AAV à adopter des pensées criminelles, fréquentes chez les psychopathes. / Developping specific intervention programmes for frauds raises the issue of personality characteristics. Studies suggest that the personality of fraudsters presents certain similarities with psychopathic traits. The goal of the study is to describe and explore the personality of incarcerated specialized fraudsters by using psychometric tests such as the Psychopathic Personality Inventory (PPI) and the Psychological Inventory of Criminal Thinking Styles (PICTS). Three groups of inmates (35 men, 17 women) completed the questionnaires: fraud specialists (n = 23), offenders who committed non-violent crimes (n = 19) and offenders who committed violent crimes (n= 10). A group of students (n = 430) also completed the PPI, thereby adding a comparison group. Analyses revealed few differences between the psychopathic traits of fraudsters and those of the other groups' respondents. However, it was revealed that fraudsters were less likely to adopt criminal thoughts, common in psychopaths, than are the respondents from the AAV group.

Les délinquants sexuels sadiques sont généralement décrits comme une entité clinique particulière commettant des délits graves. Or, la notion même de sadisme sexuel pose un nombre important de problèmes. Parmi ceux-ci, on retrouve des problèmes de validité et de fidélité. Perçu comme une maladie dont on est atteint ou pas, le sadisme a été étudié comme si les sadiques étaient fondamentalement différents. À l’heure actuelle, plusieurs travaux laissent croire que la majorité des troubles psychologiques se présentent comme une différence d'intensité (dimension) plutôt qu’une différence de nature (taxon). Même si la conception médicale prévaut encore en ce qui concerne le sadisme sexuel, plusieurs évoquent l’idée qu’il pourrait être mieux conceptualisé à l’aide d’une approche dimensionnelle. En parallèle, nos connaissances sur les facteurs contributifs au développement du sadisme sexuel sont limitées et reposent sur de faibles appuis empiriques. Jusqu'à présent, très peu d'études se sont intéressées aux facteurs menant au développement du sadisme sexuel et encore moins ont tenté de valider leurs théories. En outre, nos connaissances proviennent majoritairement d'études de cas portant sur les meurtriers sexuels, un sous-groupe très particulier de délinquants fréquemment motivé par des intérêts sexuels sadiques. À notre connaissance, aucune étude n'a proposé jusqu'à présent de modèle développemental portant spécifiquement sur le sadisme sexuel. Pourtant, l'identification de facteurs liés au développement du sadisme sexuel est essentielle dans notre compréhension ainsi que dans l'élaboration de stratégie d'intervention efficace. La présente thèse s'inscrit dans un contexte visant à clarifier le concept de sadisme sexuel. Plus spécialement, nous nous intéressons à sa structure latente, à sa mesure et à ses origines développementales. À partir d'un échantillon de 514 délinquants sexuels évalué au Massachusetts Treatment Center, la viabilité d’une conception dimensionnelle du sadisme sexuel sera mise à l’épreuve à l'aide d'analyses taxométriques permettant d'étudier la structure latente d'un construit. Dans une seconde étape, à l'aide d'analyses de Rasch et d'analyses appartenant aux théories de la réponse à l'item à deux paramètres, nous développerons la MTC Sadism Scale (MTCSS), une mesure dimensionnelle du sadisme sexuel. Dans une troisième et dernière étape, un modèle développemental sera élaboré à l'aide d'équations structurales. La présente thèse permettra de contribuer à la clarification du concept de sadisme sexuel. Une clarification de la structure latente et des facteurs développementaux permettra de saisir les devis de recherche les plus à même de capturer les aspects essentiels. En outre, ceci permettra d'identifier les facteurs pour lesquels une intervention est la plus appropriée pour réduire la récidive, ou la gravité de celle-ci. / Sadistic offenders are generally described as a particular clinical entity committing serious offenses. However, the very notion of sexual sadism is plague with a significant number of problems. Among these, there are important problems of validity and reliability. Perceived as a disease which one can or can't have, sadism was studied as if sadistic offenders were fundamentally different from non-sadistic offenders. Actually, several studies suggest that the majority of psychological disorders present a dimensional rather that a taxonic structure. Therefore, the difference between two individuals will be a difference of intensity instead of nature. Although the medical conceptualization still prevails regarding sexual sadism, many evoke the idea that it might be best conceptualized using a dimensional approach. On the other hand, our knowledge on the factors leading to the development of sexual sadism are based on weak empirical foundations. So far, very few studies have examined the factors leading to the development of sexual sadism and even fewer have attempted to validate their theories. In addition, our knowledge mainly comes from case studies of sexual murderers, some of whom exhibit an extreme form of sexual sadism. To our knowledge, no study has proposed a developmental model of sexual sadism. The identification of factors associated with the development of sexual sadism is essential in our understanding of this paraphilia and in the development of effective intervention strategies. The aim of the present thesis is to clarify the concept of sexual sadism. Specifically, we are interested in its latent structure, its assessment and its developmental origins. From a sample of 514 sexual offenders assessed at the Massachusetts Treatment Center, the viability of a dimensional conception of sexual sadism will be tested using taxometrics analyses. In a second step, using Rasch analyses and two-parameters item response theory analyses, we will develop the MTCSS, a dimensional measure of sexual sadism. In a third and final stage, a developmental model of sexual sadism will be developed using structural equations analyses. The current thesis will contribute significantly to the clarification of the concept of sexual sadism. A clarification of its latent structure and developmental factors will allow to develop better research designs to capture the essential aspects of sexual sadism. In addition, this will allow to identify the factors for which intervention is the most appropriate to reduce recidivism, or the severity of it.