A longitudinal test of the investment model: The impact on job satisfaction, job commitment, and turnover of variations in rewards, costs, alternatives, and investments

Abstract

A 12-mo longitudinal study of 88 newly hired nurses and junior accountants (mean age of all Ss 24 yrs) tested a series of assumptions from the authors' (see record 1981-31481-001 ) investment model concerning the determinants of job satisfaction, job commitment, and turnover. In general, greater job satisfaction resulted from high job rewards and low job costs; whereas strong job commitment was produced by high rewards, low costs, poor alternative quality, and large investment size. Whereas the impact of job rewards on satisfaction and commitment remained relatively constant, job costs seemed to exert an increasingly powerful influence over time. Investment size also exerted greater impact on job commitment with the passage of time. Just prior to their leaving, the job commitment of Ss who left was best predicted by a combination of rewards, costs, and alternatives. Ss who stayed and those who left differed from one another with regard to changes over time in each investment model factor—those who left experienced greater decline in rewards, increase in costs, increase in alternative quality, and decrease in investment size than those who stayed. Turnover appeared to be mediated by a decline over time in degree of job commitment. (28 ref) (PsycInfo Database Record (c) 2025 APA, all rights reserved)