This paper reports three studies examining construct validity evidence for two recently developed measures of the positive side of the work-family interface: work-to-family positive spillover (WFPS; Hanson, Hammer, & Colton, 2006) and work-to-family enrichment (WFE; Carlson, Kacmar, Wayne, & Grzywacz, 2006). Using confirmatory factor analysis, the results from the first two studies indicate that the best fitting model distinguishes between WFPS and WFE, each with three sub-dimensions. However, these studies also showed that several items measuring WFE cross-loaded onto factors measuring WFPS. Results from the discriminant analyses showed that the sub-dimensions of WFPS and WFE uniquely predicted job satisfaction and life satisfaction. Yet, when WFPS and WFE were examined as one dimension, the measure of WFE predicted life satisfaction, but the measure of WFPS did not add to the prediction above WFE. Across both studies, WFE mediated the relationship between WFPS with both job and life satisfaction. Lastly, Study 3 provides some evidence of the content adequacy of these items; however, several items overlapped in content. These results suggest that enrichment and positive spillover are distinct but related constructs, each with three sub-dimensions. Further, more work is needed to refine the measurement of WFE and WFPS; however, this research helps advance our understanding of the positive side of the work-family interface. (Contains 1 figure and 10 tables.)