Once more : testing the job characteristics model

[摘要] ENGLISH ABSTRACT: The Job Characteristics Model (JCM) is one of the most widely used and researched models in the field of Industrial Psychology. It has provided industry with useful solutions for its people-related business problems through the rearranging of the physical and psychological characteristics of jobs in order to address demotivation, dissatisfaction and marginal performance.The JCM has also endured a fair amount of criticism, however, specifically pertaining to the mediating role of the psychological state variables. Research findings on the model are divided into two camps. Some researchers argue that the model is empirically sound; while others believe the model should be discarded or adjusted. These studies were done circa 1990, however, when most of the advanced statistical analysis techniques utilised today were not available. Research related to the JCM has been decreasing steadily since then, and it seems that no final verdict was reached regarding the utility and validity of the model.The overarching objective of this study is to provide closure regarding this discourse by testing the three major theoretical postulations of the JCM in the South African context on a sample of 881 students with an ex post facto correlational research design. This was achieved by utilising structural equation modelling via LISREL.Three separate structural models were fitted and compared. The first model was a simplified version of the original model (Hackman & Oldham, 1980). The second model excluded the mediating psychological states proposed by Boonzaier, Ficker and Rust (2001). The final model had the same basic structure as the first model, but more causal paths were included between the job characteristics and the psychological states.The results show that more variance in the outcomes is explained with the inclusion of the psychological state variables. The psychological states are therefore a crucial component of the model. Although these findings corroborated the original model, the third model displayed superiority in terms of accounting for significant amounts of outcome variance in the dependent variables. These findings indicate that the job characteristics predict the psychological states in a more comprehensive manner than originally proposed in the literature.Job design interventions thus remain a useful tool and industry should utilise the suggested interventions. Furthermore, this study proposes preliminary equations (a Motivating Potential Score and resource allocation) that may be used to determine the relative importance attached to each job characteristic in the world of work.

[发布机构] Stellenbosch University