Abstract
Although many instruments have been developed to measure organizational constructs such as citizenship, climate, and organizationโbased esteem, to date no scale has been designed specifically to measure efficacy at the organizational level. Tools to measure organizational efficacy in a business context have been recommended for over two decades. This research developed an instrument to assess organizational efficacy, an extension of the theory of selfโefficacy and groupโlevel efficacy in two studies. The first study included employees of seven organizations to test divergent and convergent validity of the Organizational Efficacy Scale with existing instruments. The second study combined 22 organizations (n = 886) to validate the instrument statistically. The scale demonstrated appropriate levels of convergent and discriminant validity with existing instruments. The final 17 items displayed high reliability and supported a threeโfactor solution predicted by efficacy theory around the factors of collaboration, sense of mission, and sense of resilience. Additional psychometric properties for goodness of fit were acceptable.