


Among the support of psychological needs variables, feedback and job autonomy had positive associations with both outcomes while social support from colleagues was not predictive of performance. Procedural pay-setting justice was unrelated to both outcomes. Performance-based pay-raise amount was positively related to contextual performance but not predictive of task performance.

However, supplementary relative weight analysis (RWA) showed that, in relative terms, instrumentality of the pay system was of minor importance for performance. Multiple regression results, based on survey and register data, showed that the instrumentality of the pay system related to lower levels of task and contextual performance. The present study examined the relative importance of performance-based pay variables and support of psychological needs variables for task and contextual performance in a sample of 582 white-collar employees in Sweden. The use of performance-based pay is increasing rapidly, but empirical evidence on how and why it relates to job performance, as well as its relative strategical importance, remains unclear.
