Parents of children diagnosed with autism, a disease characterised with difficulty in speech, behaviour and language, experience chronic stress more than in any other developmental disorder. Outcomes of chronic stress in this regard are often associated with uncertain expectations of the future where current stressors are exuberated and future expectations are negated. Thinking about the future has been noted to contribute positive psychological functioning. Authors have, however, noted that some parents of autistic children are able to conceptualise positive future expectations in the mists of stressful current realities whilst using proactive coping strategies. Proactive coping literature has predominantly focused on situational characteristics and, to a lesser extent, on dispositional characteristics The relationship between dispositional characteristics - belief in just world, sense of coherence in relation to proactive coping is investigated in parents raising a child diagnosed with autism. Constructs were operationalised through the Orientation to Life Questionnaire (Antonovsky, 1987), Global Belief in Just World Scale (Lipkus, 1991), Reactions to Daily Life Questionnaire (Greenglass, 2002) and a demographic questionnaire. A cross-sectional correlational design consisting of a sample of 30 (n = 30) parents with children with autism was conducted. SPSS ver12 was used for analysis, which included both descriptive and inferential analysis. Inferential statistics included the Independent T-Test and analysis of variance (ANOVA) to analyse independence of the sample, and Spearman Rho correlations were used to test possible correlations between constructs. The small sample size precluded more advanced statistical manipulation of data. Open ended questions were analysed through a process of content analysis. The interpretation of results showed no significant differences between independent variables (e.g. age, gender, adjustment level of child) and constructs measured. Results of the correlational analysis indicated positive correlations between (i) belief in just world andproactive coping, (ii) sense of coherence and proactive coping as well as (iii) the sense of coherence (meaningfulness) subscale and proactive coping. No relationship was found between belief in just world and proactive coping. These results indicate that these dispositional characteristics can be associated with proactive coping and that belief in just world and sense of coherence who share similar theoretical underpinnings may have different predictor values. Qualitative results suggest that parents who engage in future oriented thinking and proactive coping strategies such as planning activities and social engagements often display higher levels of just world beliefs. The present study contributes to theoretical knowledge by providing insight into the relationships between constructs with regards to proactive coping in parents who experince chronic stress, by illustrating convergence and distinctiveness between constructs. Furthermore, knowledge was gained on the influence of dispositional characteristics on proactive coping strategies, seeing as how previous research primarily focused on situational characteristics. Practical applications of the results offer insight into coping processes of parents of children diagnosed with autism with specific reference to proactive coping which ultimately implicates the applicability value of future oriented therapeutic interventions for these families. Insight into the goals of parents and the daily challenges they face will furthermore assist the helping profession and support groups to provide effective support strategies. / Dissertation (MEd)--University of Pretoria, 2010. / Educational Psychology / unrestricted

Le but de cette recherche est la vérification des relations entre les pratiques de leadership et la performance de l’équipe. Nous nous concentrons sur deux pratiques de leadership distinctes : le leadership d’empowerment et le leadership autocratique. Cette recherche vise également à comprendre le rôle médiateur de l’engagement des membres envers les objectifs d’équipe dans ces relations. De plus, nous examinons la combinaison des deux pratiques de leadership chez un même responsable d’équipe, à savoir si l’adoption d’un style de leadership peut réduire ou amplifier l’effet de l’autre style de leadership. Les données de types secondaires ont été colligées auprès de 381 membres faisant partie de 101 équipes ainsi que des 101 supérieurs immédiats de ces équipes œuvrant dans une organisation de sécurité publique canadienne. Ces données ont été recueillies grâce à un questionnaire. Des analyses factorielles confirmatoires et des analyses de régression hiérarchique ont permis de vérifier nos huit hypothèses. Les résultats montrent que les pratiques de leadership sont modérément et significativement liées à la performance d’équipe. Les pratiques de leadership sont également liées fortement et significativement à l’engagement des membres envers les objectifs d’équipe. Par ailleurs, les résultats révèlent que l’engagement des membres envers les objectifs d’équipe joue un rôle médiateur complet dans la relation entre les pratiques de leadership et la performance d’équipe. Par contre, l’effet d’interaction entre les pratiques de leadership n’est pas significatif. La vérification du rôle médiateur de l’engagement des membres envers les objectifs d’équipe constitue un apport théorique dans la compréhension des équipes de travail. Sur le plan pratique, les résultats montrent que les responsables d’équipe ont intérêt à adopter des pratiques de gestion permettant l’atteinte des objectifs d’équipe tout en améliorant le sentiment d’engagement des membres et la performance d’équipe. / The purpose of this research is to study the effect that leadership practices can have on team performance. We decided to concentrate this study on two types of leadership practices that are distinct: empowerment leadership and autocratic leadership. This research also tends to explain the mediating role of team goal commitment in the relation between leadership practices and team performance. Furthermore, we examine the harmonization of both leadership practices present among a team leader to notice if the adoption of one type of leadership would diminish or amplify the impact of the other leadership type. Secondary data were collected in a public safety organization located in Canada. Overall, 381 members of 101 teams and their corresponding 101 immediate superiors were questioned through a questionnaire survey. Confirmatory factor analyses and a series of hierarchical multiple regression analyses were conducted to verify our eight hypothesis. The results showed that leadership practices have a moderate and significant effect on team performance. Leadership practices are also strongly and significantly related to team goal commitment. Otherwise, the results points out the mediating role of team goal commitment. In fact, the mediating role of team goal commitment was complete between leadership practices and team performance. Contrariwise, the interaction effect between leadership practices turned out to be not significant. The verification of the mediating role of team goal commitment represents a theoretical implication within the comprehension of team work. Likewise, on the practical side results showed that team leaders had better to adopt managing practices that can allow the team to reach the team objectives while improving the members’ sense of commitment and the team performance.

Le but de cette recherche est la vérification des relations entre les pratiques de leadership et la performance de l’équipe. Nous nous concentrons sur deux pratiques de leadership distinctes : le leadership d’empowerment et le leadership autocratique. Cette recherche vise également à comprendre le rôle médiateur de l’engagement des membres envers les objectifs d’équipe dans ces relations. De plus, nous examinons la combinaison des deux pratiques de leadership chez un même responsable d’équipe, à savoir si l’adoption d’un style de leadership peut réduire ou amplifier l’effet de l’autre style de leadership. Les données de types secondaires ont été colligées auprès de 381 membres faisant partie de 101 équipes ainsi que des 101 supérieurs immédiats de ces équipes œuvrant dans une organisation de sécurité publique canadienne. Ces données ont été recueillies grâce à un questionnaire. Des analyses factorielles confirmatoires et des analyses de régression hiérarchique ont permis de vérifier nos huit hypothèses. Les résultats montrent que les pratiques de leadership sont modérément et significativement liées à la performance d’équipe. Les pratiques de leadership sont également liées fortement et significativement à l’engagement des membres envers les objectifs d’équipe. Par ailleurs, les résultats révèlent que l’engagement des membres envers les objectifs d’équipe joue un rôle médiateur complet dans la relation entre les pratiques de leadership et la performance d’équipe. Par contre, l’effet d’interaction entre les pratiques de leadership n’est pas significatif. La vérification du rôle médiateur de l’engagement des membres envers les objectifs d’équipe constitue un apport théorique dans la compréhension des équipes de travail. Sur le plan pratique, les résultats montrent que les responsables d’équipe ont intérêt à adopter des pratiques de gestion permettant l’atteinte des objectifs d’équipe tout en améliorant le sentiment d’engagement des membres et la performance d’équipe. / The purpose of this research is to study the effect that leadership practices can have on team performance. We decided to concentrate this study on two types of leadership practices that are distinct: empowerment leadership and autocratic leadership. This research also tends to explain the mediating role of team goal commitment in the relation between leadership practices and team performance. Furthermore, we examine the harmonization of both leadership practices present among a team leader to notice if the adoption of one type of leadership would diminish or amplify the impact of the other leadership type. Secondary data were collected in a public safety organization located in Canada. Overall, 381 members of 101 teams and their corresponding 101 immediate superiors were questioned through a questionnaire survey. Confirmatory factor analyses and a series of hierarchical multiple regression analyses were conducted to verify our eight hypothesis. The results showed that leadership practices have a moderate and significant effect on team performance. Leadership practices are also strongly and significantly related to team goal commitment. Otherwise, the results points out the mediating role of team goal commitment. In fact, the mediating role of team goal commitment was complete between leadership practices and team performance. Contrariwise, the interaction effect between leadership practices turned out to be not significant. The verification of the mediating role of team goal commitment represents a theoretical implication within the comprehension of team work. Likewise, on the practical side results showed that team leaders had better to adopt managing practices that can allow the team to reach the team objectives while improving the members’ sense of commitment and the team performance.

Performance-based contracting (PBC) redefines the relationships between suppliers and buyers and differs from traditional contracting approaches with its reward/payment scheme, emphasis on the performance outcomes, increased supplier autonomy, and transfer of risk and responsibilities to suppliers. Given the 70% of life cycle costs of products/systems reside in sustainment, PBC has led to substantial improvements in availability, maintainability, reliability, and thus total cost of ownership of systems/products. Though PBC has changed the way of doing business and its presence has increased across multiple industry, private and public sectors, for profit and not-for-profit, its implications on various aspects of logistics and supply chain management have been understudied. It is important to explore and establish evidence regarding these implications through academic rigor. Therefore, this three-essay dissertation aims to give some insight regarding structural and behavioral implications of PBC using a multi-method approach. Specifically, it (1) explores the relationship between PBC and supply chain resilience (SCRES), (2) examines the supplier goal commitment (i.e., motivation) in PBC, (3) proposes a mathematical model to find optimal contract length, periodic contract price and investment that concurrently maximizing supplier profit and satisfying buyer requirements. This dissertation offers theoretical and managerial contributions as well.