How Can OD Consultants and Researchers Assess Gamma Change? A Comparison of Two Analytical Procedures

Evaluation of organizational development (OD) interventions, especially with regard to gamma change, is criticalfor both OD practitioners and researchers. Yet how to assess gamma change has not been adequately resolved. An 18-month field study of an OD intervention was used to explore empirically two alternative procedures for assessing gamma change-namely the methods of Golembiewski, Billingsley and Yeager (1976b) as compared to a modification of the methods of Terborg, Howard, and Maxwell (1980). Results suggest important differences between the methods and these differences are explored in detail.