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This study examines attitudinal variables, justice (distributive, procedural, and interactional), job satisfaction, and organizational commitment (affective and continuance) as predictors of organizational citizenship behaviors (OCBs; interpersonal helping, individual initiative, and loyal boosterism) in private sector employees in South Korea. Results show distributive justice as antecedent to loyal boosterism but not to interpersonal helping or individual initiative; procedural justice as antecedent to interpersonal helping and individual initiative but not to loyal boosterism; interactional justice as antecedent to all three OCBs; job satisfaction as antecedent to all three OCBs; affective commitment as antecedent to loyal boosterism but not to interpersonal helping or individual initiative; and continuance commitment as antecedent to loyal boosterism but not to interpersonal helping and individual initiative. The authors offer explanations for these findings based on the recent economic changes in South Korea and increasing westernization of South Korea's business practices that may be affecting traditional cultural perspectives.

This study investigated whether the inclusion of ability or role clarity could increase the predictiveness of the traditional expectancy theory model, i.e., effort = expectancy × instrumentality × valence. Both variables had an effect, but the influence of ability was much greater than that of role clarity in a sample of 285 undergraduates.

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