PREDICTING WORK ACTIVITY AND PARTICIPATION LEVELS IN TEACHERS: A TEST OF KARASEK'S (1979) SECOND HYPOTHESIS
Bradley, G., Griffith University, Australia
Karasek (1979; Karasek & Theorell, 1990) proposed that job demands and control predict levels of worker activity and participation both on and off the job. The current research tested this hypothesis in a two-phase panel study of school teachers (N = 711 at Time 2). The dependent variable was assessed using multi-item self-report scales measuring work motivation, vigor-activity, discretionary effort and participation in non-work activities. Contrary to predictions, job demands were negatively correlated with motivation and vigor. All other correlations between the job factors and the outcome variables were in the expected (positive) direction. Hierarchical multiple regression analyses and structural equation modeling provided little support for the hypothesis, with only small proportions of the variance in the dependent variables explained by the joint influence of the two job factors. Implications for levels of worker activity-participation, Karasek's theory, and further research in this area, are discussed.