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This study examined job stressors and coworker social support in relation to both psychological strains and performance. One hundred and ninety‐eight door‐to‐door bookdealers, employed on a seasonal basis, completed self‐report measures of job stressors, psychological strains, coworker social support, and job performance. Performance data were also obtained from company records. Results indicated that stressors predicted both psychological strains and one of the two measures of performance. The strongest predictor was a job‐specific measure of chronic stressors. Social support predicted psychological strains, although it was only weakly related to performance. There was no evidence that social support moderated the effects of any of the stressors. Implications of these findings are discussed. Copyright © 2000 John Wiley & Sons, Ltd.