No description available.

No description available.

No description available.

[pt] As escolhas alimentares humanas são complexas e estão condicionadas por variáveis biológicas, sociais, culturais, históricas e psicológicas. Esta dissertação teve como objetivo investigar aspectos psicológicos das escolhas alimentares, como as motivações e os fatores da personalidade, e suas relações com a saúde psicológica. Para isso, foram apresentados três artigos. O primeiro, testa as relações entre as escolhas alimentares, os cinco grandes fatores da personalidade e a saúde psicológica em uma amostra brasileira. O segundo investiga diferenças em aspectos da personalidade e saúde psicológica em diferentes grupos dietéticos. O terceiro apresenta relações entre as motivações para as escolhas alimentares e os cinco grandes fatores da personalidade. De forma geral, os resultados apresentados são condizentes com estudos internacionais anteriores. No primeiro artigo, destacam-se relações positivas entre abertura a experiência, conscienciosidade e saúde psicológica com o consumo de frutas e vegetais. No segundo artigo, não foram encontradas diferenças esperadas em traços de personalidade em diferentes grupos de dieta. No terceiro artigo, foram encontradas relações esperadas entre o fator conscienciosidade e motivos para as escolhas alimentares, além da relação positiva do fator humor e o neuroticismo. Espera-se que esses resultados contribuam de maneira significativa para a literatura sobre os temas abordados, além de prover aplicações terapêuticas valiosas para psicólogos, nutricionistas e nutrólogos no exercício de suas profissões. Entendendo as relações entre personalidade, motivos para as escolhas alimentares e suas relações com a saúde psicológica, é possível pensar em estratégias personalizadas que podem ser mais adequadas as necessidades de cada paciente no que diz respeito a suas próprias escolhas alimentares, promovendo um estilo de vida mais saudável de forma geral. / [en] Human food choices are complex and are conditioned by biological, social, cultural, historical and psychological variables. This dissertation aimed to investigate psychological aspects of food choices, such as motivations and personality factors, and their relationships with psychological health. For this, three articles were presented. The first tests the relationships between food choices, the big five personality factors and psychological health in a Brazilian sample. The second investigates differences in aspects of personality and psychological health in different dietary groups. The third presents relationships between motivations for food choices and the five major personality factors. In general, the results presented are consistent with previous international studies. In the first article, positive relationships are highlighted between openness to experience, awareness and psychological health with the consumption of fruits and vegetables. In the second article, no expected differences in personality traits were found across different diet groups. In the third article, expected relationships were found between the consciousness factor and reasons for food choices, in addition to the positive relationship between the humor factor and neuroticism. It is expected that these results will contribute significantly to the literature on the topics involved, in addition to providing valuable therapeutic applications for psychologists, nutritionists and nutritionists in the exercise of their professions. Understanding the relationships between personalities, reasons for food choices and their psychological relationships with health, it is possible to think of personalized strategies that can be more personalized according to the needs of each patient, with regard to their own food choices, promoting a style healthier lifestyle in general.

Cette thèse a testé un modèle explicatif de santé psychologique au travail, intégrant comme variable bipolaire, l'épuisement professionnel et le bien-être psychologique. Sur la base du Job Demands-Resources Model, des facteurs d'exigences (conflits de rôles et charge de travail) et de ressources organisationnelles (justice organisationnelle, autonomie au travail et soutien social) ont été catégorisés. Le postulat de base de ce modèle a été de prédire des effets directs et indirects des exigences et des ressources sur la santé psychologique par l'intermédiaire de l'assertivité. L'objectif était la validation prévisionnelle et transculturelle du modèle, à travers une modélisation par équations structurelles, auprès de deux échantillons comprenant des enseignants et des infirmiers français et gabonais. L'effectif total de la première vague de données regroupait 273 participants (France : N = 90 enseignants, N = 45 infirmiers ; Gabon : N = 93 enseignants, N = 45 infirmiers) et celui de la deuxième vague s'élevait à 400 participants (France : N = 108 enseignants, N = 96 infirmiers ; Gabon : N = 141 enseignants, N = 55 infirmiers). En France, les résultats démontrent que les exigences au travail agissent directement sur la santé psychologique et que leurs effets sont aussi médiatisés par l'assertivité. Les ressources, pour leur part, influencent directement la santé psychologique. Quant aux résultats du Gabon, les exigences et les ressources organisationnelles prédisent directement la santé psychologique, sans effet médiateur de l'assertivité. De plus, au sein des deux populations, l'assertivité s'est avérée être non seulement une variable salutaire au regard des conditions de travail, mais aussi un fort prédicteur de la santé psychologique au travail. / This thesis tested an explicative model of psychological well-being at work, including as a bipolar variable, burnout and psychological well-being. Based on the Job Demands-Resources Model, jobs demands (role conflict and workload) and job resources (organizational justice and social support) were categorized. The basic assumption of this model was to predict the direct and indirect effects of job demands-resources on psychological health at work through assertiveness. The goal was the previsional and transcultural validation of the model through structural equation modeling, with two samples : teachers and nurses French and Gabonese. The total of the first wave of data consisted of 273 participants (France : N = 90 teachers, N = 45 nurses ; Gabon : N = 93 teachers, N = 45 nurses) and the second wave was 400 partcicipants (France : N = 108 teachers, N = 96 nurses ; Gabon : N = 141 teachers, N = 45 nurses). In France, results demonstrate that the job demands act directly on the psychological health and their effects are also mediated by assertiveness. resources, in turn, directly affect psychological health. As for results of Gabon, job demands-resources directly predict psychological health, unmediated effect of assertiveness. In addition, in both populations, assertiveness is not only a beneficial variable compared to working conditions, but also a strong predictor of psychological health at work.

The research literature contains a significant amount of information on the psychological health of managers, however, relatively little has been written about the psychological health of workers. There has been a long held assumption that there is little difference in the psychological health of workers and managers. This study challenges that assumption and investigates differences in psychological health that appertain to job role and job characteristics determined by job role. This study tested two related hypotheses, firstly, that 'managers have significantly better psychological health than workers'; secondly, that 'that better psychological health was largely due to the increased self esteem that comes from having a more socially desirable role'. Initial analyses of the data indicated that hypothesis 1 was upheld, but when split by sex hypothesis 1 was only upheld for females and not males; similarly hypothesis 2 was only upheld for females. This result was attributed to the influence of two variables, the 'attribution of blame' and 'need for external validation', and the different moderator and mediator roles they play for males and females. The study contradicts the assertion that the psychological health of workers and managers is similar, if not the same, and uses the differences found to explain why research in this field has often produced conflicting results. Areas of potential future research are indicated.

The student experience is a unique journey of challenge and opportunity, for which their success, subjective well-being (SWB) and psychological health are key elements. In three related investigations, this mixed-methods research programme examined the effects of Time-Perspective (TP: An individual’s psychological relationship with time) and Character-Strengths (CS: 24-positive traits associated with good character) on these outcomes. Investigation 1 involved developing a Likert-type scale to measure students’ success in areas they felt were important to the construct. Qualitative content analysis identified that HE students and staff collectively defined success as a multifaceted construct, consisting of numerous academic, non-academic and social aspects. These informed the development of a reliable and valid questionnaire for measuring success perceptions in seven of these areas. This was used in the following investigation to assess a range of outcome variables pertaining to student success. Investigation 2 was a longitudinal study assessing the effects of TP and CS on the success, good/poor psychological health and SWB of Year-1 HE students. In line with previous research, excessive or insufficient use of certain TP orientations was associated with, and could predict multiple positive and negative outcomes. For example, Future and Past-Positive orientations were predictive of academic success, perceived student success and SWB. Student psychological problems were associated with a bias towards Past-Negative and Present-Fatalist orientations. Additionally, a new formula for calculating a continuous Balanced Time Perspective (BTP) variable was devised and tested. High levels of BTP were associated with many positive aspects of the HE experience. Strengths were mainly associated with SWB and perceptions of success. However, Hope and Self-Regulation were inversely related with depression, anxiety, stress and negative-affect. Investigation 3 was a follow-up interview study with six student participants, who presented interesting profiles in Investigation 2. They talked about their experiences of psychological ill-health/well-being and student success in relation to TP and CS. Five super-ordinate themes were identified, including ‘Living with negative past experiences’, ‘A balancing act’ and ‘Using my strengths’. Psychological difficulties represent an escalating problem in HE, and student success and SWB are important outcomes. Both TP and CS offer additional understandings of these areas, adding value in academic, practical and theoretical contexts. This research has indicated that interventions focused on TP modification (i.e. developing a BTP) and strength development, may potentially offer preventative mental-illness strategies for susceptible students and enhance their success and SWB.

Coaches play a central role in shaping the sport environment for young athletes. This thesis is focused on the leadership process in sports and how coaches’ autonomy-supportive and controlling interpersonal styles longitudinally are related to young athletes’ motivation and ill- and well-being. The aim is also to examine psychometric multidimensionality in measures of coaches’ need-supportive and controlling interpersonal styles. Questionnaire data from young athletes were used in the empirical studies. In Study 1, we examined an adaptive motivational process (i.e., longitudinal associations between autonomy support, need satisfaction, self-determined motivation, and well-being). The results showed that within-person changes in perceived autonomy support, need satisfaction, self-determined motivation, and well-being were all positively correlated. Higher self-determined motivation and well-being early in the season longitudinally predicted higher levels of perceived autonomy support from the coach. Higher self-determined motivation was also a positive predictor of within-person changes in perceived autonomy support and well-being over the season. In Study 2, we examined a maladaptive motivational process (i.e., longitudinal associations between coaches’ controlling behaviors, controlled motivation, and ill-being). The findings demonstrated that athletes who perceived their coach as more controlling reported higher controlled motivation at the end of the season and that higher controlled motivation early in the season predicted higher ill-being at the end of the season. Controlled motivation was also a positive predictor of athletes’ perceptions of coaches’ controlling behaviors at the within-person level. Study 1 and 2 suggest that individual factors (e.g., motivation and well-being) seemed to function as important determinants of how athletes perceived their coach and future research should explore the underlying mechanisms through which these processes occur. In Study 3, we examined psychometric multidimensionality in measures of athletes’ perceptions of coaches’ need-supportive (Interpersonal Supportiveness Scale-Coach [ISS-C]) and controlling (Controlling Coach Behaviors Scale [CCBS]) interpersonal styles. The analyses indicated that the ISS-C is not multidimensional; it appears to comprise a single factor. Three of the four subscales of the CCBS appear to share a common core, whereas the fourth subscale (i.e., controlling use of rewards) seems to represent a slightly different aspect of a controlling interpersonal style. These results bring into question the multidimensionality in measures of athletes’ perceptions of coaches’ interpersonal styles. Neither measure displayed a coherent multidimensional pattern, indicating a need for better alignment between theory and measurement.

Cette thèse a pour objectif d’apporter des résultats pour la connaissance relative au processus d’intervention dans l’organisation en matière de prévention de la santé psychique au travail. Après avoir mis en lien les processus de construction de la santé au travail et pris connaissance des facteurs qui soutiennent la réussite des interventions de prévention primaire, l’analyse permet de questionner la correspondance possible entre ces deux champs de recherche. L’analyse de sept cas d’intervention apporte des éléments pour saisir les conditions qui favorisent la décision de changement de l’organisation. Le processus d’intervention est conçu comme un moyen de produire une dynamique de maturation organisationnelle sur la question de la santé psychique au travail et susceptible d’améliorer la coopération entre acteurs. Enfin, en interrogeant l’interaction entre l’individu et l’organisation, cette thèse analyse les logiques de recours à des formes d’aides pour des salariés en difficulté. Ce détour permet d’interroger les causes du non-recours à des dispositifs organisationnels de prévention et à identifier à quelles conditions ils peuvent être efficaces et utilisés. / We aim to contribute to the study of intervention process in the organization for mental health prevention in the workplace. We begin by linking the different health-building processes in the workplace. We then take into account the factors that support the success of primary prevention interventions. Our analysis then allows for exploration of possible relationship between these two research fields. Our examination of seven cases studies of prevention interventions brings elements of understanding to the conditions that best favour the decision to change an organization. The intervention process is designed as a way to produce a dynamic organizational maturation on the issue of mental health in the workplace, which is likely to improve cooperation between actors. Finally, by questioning interactions between the individual and the organization, this dissertation analyzes the logic behind the non-take-up strategies used by troubled employees. It allows us to examine why arrangements within an organization are not used and to identify under what conditions they can be efficient and well used.

This dissertation combines psychology with peace and conflict research in a cross-disciplinary approach to reconciliation processes after intrastate armed conflict. Two overarching contributions are made to the field of reconciliation research. The first is conceptual and methodological. The vague concept of reconciliation is defined and operationalized (Paper I), and a method is proposed for how reconciliation may be studied systematically at the national level (Paper II). By discussing what reconciliation is and how we should measure it, comparative research on reconciliation is facilitated which is imperative if we wish to learn of its promises and pitfalls in post-conflict peacebuilding. The second contribution is empirical. There has been an assumption that truth telling is healing and thereby will lead to reconciliation; healing is the assumed link between truth and reconciliation. This assumption was investigated in two studies in Rwanda in 2006. A multistage, stratified cluster random survey of 1,200 adults was conducted to assess whether witnessing in the gacaca, the Rwandan village tribunals for truth and reconciliation, was beneficial for psychological health; thereby investigating the claim that truth telling is healing (Paper III). The results of the survey are disconcerting. Witnesses in the gacaca suffered from significantly higher levels of depression and posttraumatic stress disorder than non-witnesses also when controlling for important predictors for psychological ill-health such as gender or trauma exposure. To acquire a more comprehensive understanding of the experience of witnessing in the gacaca, in-depth interviews were conducted with 16 women genocide survivors who had witnessed in the gacaca (Paper IV). The results of this study challenge the claim that truth telling is healing, suggesting instead that there are risks for the individuals on whom truth-telling processes depend. Traumatization, ill-health, isolation, and insecurity dominate the lives of the testifying women. Insecurity as a result of the truth-telling process emerged as one of the most crucial issues at stake. This dissertation presents a novel understanding of the complexity of reconciliation in post-conflict peacebuilding, demonstrating that truth and reconciliation processes may entail more risks than were previously known. The results of this dissertation can be used to improve the study and the design of truth and reconciliation processes after civil war and genocide.