Fig. 1.
The hypothesized full mediation model.
In H1, quantitative demands were examined; in H2, qualitative demands were examined.
Standard residual scores were calculated from T1 to T2 regression analysis for boredom and work engagement, and from T1 to T3 regression analysis for psychological distress and turnover intention. T1: fourth wave; T2: fifth wave: T3: sixth wave.