Perceived Organizational Support: Fuurther Evidence of Construct Validity

Wayne Shore and Lois Tetrick demonstrated in 1991 that the Survey of Perceived Organizational Support (SPOS), a measure of perceived employer commitment, was unidimensional and distinguishable from measures of affective and continuance commitment. In the present study, confirmatory factor analysis was used to further examine the construct validity of the scores on the SPOS. Participants were 205 members of the staff and faculty of a large western state university. Consistent with Shore and Tetrick's findings, the SPOS was found to be unidimensional. In addition, the SPOS was found to be distinguishable from two similarly conceptualized correlates of affective commitment: perceived supervisory support and organizational dependability. Findings are discussed with respect to their implications for understanding the commitment process.

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