The purpose of the present study was to further explore evidence for the construct-related validity of the Sulliman Scale of Social Interest (SSSI) through the implementation of both convergent and discriminant procedures. This was done through (a) replicating St. John's 1992 study, (b) extending the findings of that study by incorporating additional psychological measures, and (c) examining SSI itself by means of principal axis factor analytic procedures. First, all nine of the relationships demonstrated between the SSSI and other variables in the St. John (1992) study were replicated in the present study. Second, in extending the findings of that study, 22 of 26 hypothesized relationships between the SSSI and other psychological measures were in the predicted direction. Third, the results of the factor analysis produced three factors labeled "contextual harmony," "positive treatment/response," and "confidence and trust." Taken together, the outcomes of both studies appear to offer some support for the SSI's construct validity and to provide possible directions for future research.