This study was designed to explore the concurrent validity of the Spiritual Well-being Scale (SWB). Ninety first-year student volunteers at an evangelical seminary served as subjects. As part of a larger study, the students completed the SWB and the Interpersonal Behavior Survey (IBS). The SWB Scale is a 20-item self-report scale. Ten items measure the vertical dimension of relationship to God, and comprise Religious Well-being (RWB). The IBS measures several dimensions of interpersonal behavior. It contains MMPI-type validity scales, seven aggressiveness scales, eight scales measuring assertiveness behaviors, and three relationship scales. Results showed that SWB--and its subscales RWB and Existential Well-being (EWB)--were positively correlated with the Denial and Impression Management validity scales of the IBS and negatively correlated with the Infrequency Scale; they were negatively correlated with all of the aggressiveness scales; they correlated positively with five of the assertiveness scales and were not significantly related to the remaining three assertiveness scales; they correlated negatively with the Shyness and Dependency relationship scales, but were unrelated to the Conflict Avoidance Scale. The results suggest that Spiritual Well-being is negatively related to self-reported aggressiveness, dependency, and shyness in this seminary population. (LMO)