A Methodological Critique of Fifty-Eight Selected Work Experiments

This paper evaluates the internal and external validity of 58 work experiments-e.g., job enrichment, participative management, and autonomous group studies. The experiments are classified according to their independent and dependent variables; then each study's research design is evaluated in terms of various threats to internal and external validity. The results show that the attitudinal and performance improvements reported in the experiments are questionable but not altogether implausible. The findings of the studies appear to be generalizable to a wide range of populations and settings. Several suggestions for the improvement of research in this field are presented in light of the results of this critique.