Psychometric Evaluation and Standardization of the Self and Other Scale

This article evaluates and extends the psychometric properties of the Self and Other Scale (SOS). The scale is designed to measure two types of threat to self construction, namely, an insecurity threat (fear of exclusion) and an engulfment threat (fear of intrusion). Previous analysis of the SOS has been based on nonclinical student populations with a narrow age range. The present study addresses this limitation by examining the psychometric properties of the scale with an adult nonclinical population (N = 150) covering the life span and with varied socioeconomic status. Results are compared with those of the previous study. Statistical analysis supports the construct validity and the reliability of the scale. Clinical implications of the scale are explored.