Auflistung nach Autor:in "Abdel Hadi, Sascha"

Gerade angezeigt 1 - 3 von 3
  • Vorschaubild
    Item
    The Association of the 24 Hour Distribution of Time Spent in Physical Activity, Work, and Sleep with Emotional Exhaustion
    (2018) Janurek, Janina; Abdel Hadi, Sascha; Mojzisch, Andreas; Häusser, Jan Alexander
    Previous research identified time spent in physical activity, sleeping, and working as predictors of emotional exhaustion. However, this research did not take into account the interdependence of these time-use components. Since daily time is limited to 24 h, time spent in one specific activity (e.g., sleep) cannot be used for any other activity (e.g., physical activity). We conducted a one-week daily sampling study to assess the compositional effects of physical activity, sleep, and work on emotional exhaustion. Since the sample consisted of 104 undergraduate students, work was operationalized as study time. Participants wore accelerometers for one week continuously to assess sleep and physical activity. Also, they filled in questionnaires on study time and emotional exhaustion every morning. Multilevel and compositional data analyses were conducted. The multilevel analysis revealed significant between- (p = 0.012) and within-level (p < 0.001) associations of study time with emotional exhaustion. The compositional approach showed that time spent in physical activity was negatively related to emotional exhaustion (p = 0.007), whereas time spent studying was positively related to emotional exhaustion (p = 0.003), relative to the remaining two time-use components. In conclusion, our results show that emotional exhaustion is not only associated with work-related factors, but also with off-job physical activity.
  • Vorschaubild
    Item
    Investigating the relationships between job characteristics, physical activity, and well-being : a mixed methods approach
    (2020) Abdel Hadi, Sascha
    This dissertation is devoted to a detailed evaluation of the relationships between job characteristics, leisure-time physical activity (LTPA), and well-being drawing on the assumptions of the recently introduced physical-activity mediated Demand-Control (pamDC) model by Häusser and Mojzisch (2017). The two key concerns were to i) evaluate the effects of job demands (via self-regulation) and job control (via self-determina-tion) on LTPA within varying time frames (ranging from short-term effects within days to time-lagged effects over weeks), and ii) test for a mediating effect of LTPA for the effects of job demands and job control on well-being for the first time.To address these questions, five empirical studies were conducted that differ in their scope (Study 1 aimed to test the central assumptions of the pamDC model for the first time, whereas Studies 2 to 5 focused on the relationships between job characteristics and LTPA) and methodological approach. While Studies 1 and 5 were based on longitudinal designs with a working sample, Studies 2 to 4 employed experimental designs to increase confidence with regard to causal directions of the assumed processes.Overall, I found general support for the effects of job demands on LTPA (as three out of four studies found an effect) although this effect does not seem to be mediated through self-control and mainly unfolded in a short time frame. There was no support for direct effects of job control on LTPA as none of the studies that tested these relationships revealed significant effects. However, there was an indirect effect of job control on LTPA through self-determination in Study 4. With regard to the proposed mediation of LTPA for the effects of job characteristics on well-being, I found partial support as daily LTPA could be identified as a mediator for the effects of daily job demands but not for the effects of daily job control on well-being.
  • Vorschaubild
    Item
    The reciprocal relationship between social identification and social support over time: A four-wave longitudinal study
    (2023) Häusser, Jan; Abdel Hadi, Sascha; Reichelt, Charlene; Mojzisch, Andreas