Previous research has provided a helpful, albeit narrow, understanding of task interruptions as related to outcomes such as wellness and performance (e.g., Eyrolle & Cellier, 2000). Building on this foundation by viewing interruptions through the broader theoretical context of the theory of mental workload, this study sought to explain the cognitive processes underlying the negative performance effects often associated with interruptions and to apply an intervention aimed at mitigating these effects. Specifically, mindfulness has emerged as a promising method for reducing the cognitive burden of interruptions. This study examined the effects of intrusions (a type of interruption) on psychological strain and performance through perceived mental workload. Although perceived mental workload did predict strain outcomes, the overall mediation models failed to reach significance. Results also failed to support the hypothesized effect of state mindfulness as a potential moderator. A set of post hoc analyses, however, found that intrusion perceptions acted as a mediator between intrusion condition and psychological strain outcomes. Further, this mediation was moderated by state mindfulness, which in turn was moderated by the intrusion time. Specifically, the indirect effect of intrusion condition on strain outcomes was such that individuals experienced more strain if they received an intrusion compared to those who were not given an intrusion, unless they completed the form quickly and were also low on state mindfulness, in which case there was no difference in strain outcomes based on whether they experienced an intrusion. Together, these results suggest that intrusion perceptions play key roles in strain outcomes, and that moderators of these relationships should be further explored.

Regular physical activity is associated with improved physiological and psychological wellbeing, by reducing the risk of chronic illnesses such as cardiovascular disease, cancer, obesity, diabetes, osteoporosis and depression. There is a common perception that physical activity levels in the population are declining, and one of the biggest changes affecting this is occupational based activity. Since adults spend on average over 50% of their waking hours at work, work sites have the potential to be an important setting for health promotion initiatives. Cognitions and behaviours are key causal factors behind many of today s most widespread health problems and illnesses. The stage of change model has been highlighted as having intuitive appeal because it considers the dynamic nature of attitudes and behaviour change. This thesis is concerned with the application of the stage of change model to an occupational health intervention promoting physical activity. Several research studies were undertaken to explore the experiences of employees with workplace health initiatives and investigate the strategies and practices used by occupational health to promote healthy behaviours. These research studies highlighted the barriers and facilitators to successful health interventions and contributed towards the design, development and implementation of an activity promotion intervention. Additional research was also conducted to develop information materials based on the stage of change model. The stage approach was simplified and intervention materials were classified based on whether employees were thinking about making a change or not thinking about making a change to their activity levels. In order to test the materials, a twelve month intervention was implemented in ten work sites across the UK that were allocated to one of three groups. Two groups received information materials and one group received no information during the intervention period (control group). The difference between the two groups who received information was that one group received standard activity promotion information (standard group) and the second group received tailored information based on their stage of change construct (staged group). Participants in the staged intervention group demonstrated significant decreases in body mass index, fat percentage, waist circumference, blood pressure and resting heart rate following the twelve month intervention. In contrast, reductions were identified for the standard intervention group for waist circumference and diastolic blood pressure. Finally, there were no long-term significant improvements identified for the control group. However, group comparisons revealed there were no significant differences between the intervention conditions. The intervention also recorded self-reported psychological outcomes, which demonstrated variations throughout the intervention period for all groups. The potential reasons for these inconsistent outcomes are discussed. A process evaluation following the intervention demonstrated employees valued the health screenings and identified issues relating to knowledge, behaviour change and health implications that were important outputs of the intervention. Based on these findings, the research concludes there is scope to make physical activity interventions in the workplace more effective by applying the stage of change approach. Using the process of simplifying the stages and focusing on whether employees want to change their behaviours or not allows occupational health to deliver information that could be more meaningful and have a significant impact on behaviour change. By understanding employees readiness to change their activity behaviours and targeting information based on their beliefs, attitudes and intentions to change may produce significant improvements in health outcome measures compared to standard information. The results also suggest there is potential for this type of tailored intervention to be extended to other occupational health issues.

This study proposes a model to test the relationships amongst supervisors' health behaviors and leadership behaviors. Specifically, 107 supervisor-subordinate pairs responded to a cross-sectional survey. Supervisors provided self-reports of their health behaviors (physical activity, diet, sleep, alcohol/tobacco use) and perceived well-being. Subordinates rated the supervisors' perceived leadership style and the quality of relationships they share at work. Results were mixed with support largely being found for previously established relationships between (a) physical activity, sleep duration and quality, and well-being, and (b) leadership behaviors and supervisor-subordinate relationship quality. The primary thesis of this study--that leaders with improved health behaviors and well-being will engage in more active leadership behaviors and fewer passive behaviors--was not supported. This study served as a first-step towards a more sophisticated understanding of how a healthy lifestyle impacts leaders' at-work behaviors and performance.

No description available.

Over the past three decades, the workforce has become more age-diverse, leading organizations to recognize the importance of supporting the well-being, motivation, health, and productivity of older workers. Previous research has highlighted the challenges faced by older workers, including ageism, health declines, financial constraints on retirement, and caregiving responsibilities. However, the literature often treats older workers as a homogeneous group, neglecting the significant heterogeneity within this population. This study addressed this gap by adopting a person-centered approach to investigate the diverse experiences of older workers. By leveraging the Psychology of Working Theory (PWT) as a conceptual framework, this study examined how different combinations of working conditions (i.e., job insecurity, income inadequacy, lack of work protections, and vulnerability to mistreatment) relate to psychological constructs and work-related outcomes among older workers. Data were collected from 549 workers over the age of 50 (M=59.24, SD=5.85) within the United States and analyzed using latent profile analysis. The results identified four distinct profiles of older workers: Unprecarious, Bridge Workers, Detached, and Precarious. The profiles were qualitatively and quantitatively different, with the Unprecarious profile characterized by low levels of all indicator variables, and the Precarious profile characterized by high levels of all indicator variables. Detached participants reported feeling stuck in their jobs, and Bridge Workers reported high income inadequacy and feeling unprotected at work, but low job insecurity and vulnerability to mistreatment. Unprecarious participants reported the highest levels of need satisfaction, well- being, and life satisfaction, and the Precarious participants reported the lowest levels on all outcomes, with the Bridge Workers and Detached participants in between. Overall, this study sheds light on the heterogeneity within the older worker population and highlights the importance of considering various combinations of working conditions in understanding their experiences, thus advancing our understanding of this diverse segment of the workforce. Theoretical and practical implications are discussed.

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No description available.

No description available.

Malgré la préoccupation croissante des chercheurs et praticiens pour la santé psychologique au travail, le concept de bien-être vécu au travail est encore mal compris de la communauté scientifique. En effet, peu d’efforts ont été consacrés à ce jour pour développer des connaissances sur le bien-être psychologique au travail arrimées à la réalité des employés. Cette thèse a donc pour objectif de développer une conceptualisation du bien-être psychologique au travail et une instrumentation psychométriquement fiable lui étant rattachée. Pour ce faire, deux études ont été réalisées. La première, de nature qualitative et exploratoire, fut menée auprès de 20 travailleurs canadiens francophones afin de répertorier, à partir d’incidents critiques vécus par ceux-ci, des manifestations de bien-être psychologique au travail. Celles-ci ont pu être classifiées selon un modèle en 2 axes, soit la sphère de référence dans laquelle le bien-être psychologique au travail se vit et la directionnalité selon laquelle il se développe. Ce modèle a ensuite été comparé aux conceptualisations génériques du bien-être psychologique existantes, et cette analyse a permis d’étayer la validité convergente et divergente du modèle. Dans un deuxième temps, l’Indice de bien-être psychologique au travail (IBEPT) a été créé sur la base des manifestations relevées lors de l’étude qualitative, afin d’en assurer la validité de contenu. Une version expérimentale de l’instrument a ensuite été soumise à une expérimentation auprès de 1080 travailleurs québécois. Les analyses factorielles exploratoires révèlent une structure interne en 25 items reflétant 5 dimensions, représentant elles-mêmes un construit de second ordre. La validité de construit de cette conceptualisation a ensuite été étudiée par l’analyse des intercorrélations avec une série de mesures du bien-être et de la détresse psychologique génériques. Les résultats appuient la validité convergente de l’instrument, et démontrent également sa validité divergente. Enfin, l’instrument affiche une cohérence interne satisfaisante. Au terme de cette recherche doctorale, les résultats des deux études sont interprétés en fonction de l’état actuel des connaissances sur le bien-être psychologique, les limites des études sont énoncées, et des pistes de recherche future sont avancées. / Despite growing concern by researchers and practitioners about psychological health at work, the concept of well-being in the workplace is still misunderstood in the scientific community. Indeed, little effort has been made to develop knowledge about psychological well-being at work that is tied to the reality of employees. This thesis aims at developing a conceptualization of psychological well-being at work and a related psychometrically reliable instrumentation. To do so, two studies were carried out. First, an exploratory qualitative study was conducted among 20 French-speaking Canadian workers to identify, using critical incidents they experienced, manifestations of psychological well-being. The manifestations were classified according to a 2-axis model, namely, the reference level at which psychological well-being at work is experienced and the directionality through which it emerges. This model was then compared to existing context-free conceptualizations of psychological well-being; this analysis offered support to the model's convergent and divergent validity. Second, the Index of Psychological Well-Being at Work (IPWBW) was created based on the manifestations identified in the qualitative study, in order to ensure the latter’s content validity. An experimental form of the questionnaire was administered to 1,080 Quebec workers. Exploratory factor analyses revealed an internal structure of 25 items and 5 dimensions, representing a second-order construct. The construct validity of the model was established by analyzing the intercorrelation pattern with various context-free measures of psychological well-being and distress. The results support the convergent validity of the instrument and demonstrate its divergent validity. Finally, the questionnaire shows satisfactory internal consistency. By way of conclusion, the results of the two studies are interpreted in the light of current knowledge on psychological well-being; the limits of the studies are outlined; and avenues for future research are proposed.