Building on philosophy of science literature and two original studies, this paper argues for the necessity of incorporating all three portions of Wood's (1991) theoretical model of corporate social performance (CSP) into its measurement. It begins by describing the two studies of an organizational phenomenon not commonly studied – internal fund drives to employees. Insights from these studies of corporate PAC and United Way campaigns are then used to illustrate how important it is to incorporate all three portions of Wood's model into the measurement of CSP to prevent drawing faulty conclusions. The paper concludes by providing a matrix for use in testing the validity of CSP measures.