A study was conducted to assess the equivalence of validity and reliability of two forms of the Self-Esteem Rating Scale. A total of 228 responses were obtained from a purposive sample. Several data analysis methods were used to test specific hypotheses, and two methods of equating observed scores on the two forms were used. The results were consistent with the general hypothesis of equivalence of validity and reliability. Equipercentile and linear equating methods produced nearly the same results in terms of equivalent scores between the two forms. The results suggested that the two forms of the Self-Esteem Rating Scale produce scores with a practical level of equal validity and reliability, that the two forms may be used interchangeably in social work practice, and that the equating formula may be used to convert a score from one form to an equivalent score on the other form. (Contains 5 figures and 1 table.)