Effects Of Growth Need Strength Research Articles

Methodological and substantive extensions to the job characteristics model of motivation

Three issues arising from the job characteristics model of motivation (J. R. Hackman & G. R. Oldham, Organizational Behavior and Human Performance 1976, 16, 250–279) are addressed: (1) the validity of the motivating potential score (MPS) formula based on the hypothesis that all three psychological states are necessary for internal motivation to exist; (2) the validity of the hypothesized two-stage moderating effect of growth need strength (GNS); and (3) the effects of valences of the psychological states upon personal and work outcomes. Analytic techniques employed by previous researchers are shown to be inadequate. Hierarchical multiple regression techniques are outlined which permit valid tests of the model. Results from a sample of 90 respondents indicate: (1) no support for the current MPS formulation; (2) some support for the GNS moderating effect on the job dimensions-psychological states relationship, but no support for the moderating effect of GNS on the psychological states-outcomes relationship; (3) evidence for an interaction of psychological states and valences of psychological states in influencing internal motivation.

A partial test and extension of the job characteristics model of motivation

This paper reports the results of a partial test and extension of the job characteristic model of motivation using data from supervisors and managers of an automobile assembly plant. The model has also been extended to include an expectancy theory type of outcome in addition to the ones outlined in the original formulation. The individual moderating effects of growth need strength and need for achievement are also investigated. The results provide partial support for the hypothesized relationships. Job characteristics relations with outcome measures were low but statistically significant. The correlations with expectancy type outcomes were encouraging given their exploratory nature in the model. The moderator effects of growth need strength, to the extent tested, showed rather weak relationships while need for achievement had no such effects. The validity and superiority of the double multiplicative model has also been tested but found unsupported.