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The Critical Psychological States: An Underrepresented Component in Job Characteristics Model Research

The mediating role of the critical psychological states (CPS) in the job characteristics model was examined in two studies. Using Baron and Kenny’s (1986) approach for examining mediation hypotheses, results from Study 1: (1) supported the hypothesized linkages between the core job dimensions and the CPS, and between the CPS and attitudinal outcomes; (2) provided no support for the hypothesis that all three CPS must be experienced to maximize internal work motivation; (3) supported the present authors’ hypothesis that the CPS would explain significant amounts of outcome variance beyond the core job dimensions; and (4) supported the present authors' hypothesis that the CPS are partial rather than complete mediator variables. Using causal modeling analyst and another sample, results from Study 2 provided the strongest support for a job characteristics model that allowed the core job dimensions to have direct and indirect effects on personal and work outcomes, further supporting the Study 1 finding that the CPS were partial mediator variables. The general discussion centered on the implications the present findings have for future job characteristics model research.