Tested the reliability and validity of the EQRI ("Scale of the Quality of Interpersonal Relations"), a scale developed to assess the quality of interpersonal relationships with family members, love partners, friends, colleagues, and others. Ss were 600 university students. In Exp 1, Ss completed the EQRI. The results were statistically analyzed to determine internal consistency. In Exp 2, Ss completed the scale and several other standard psychological questionnaires. The results were statistically analyzed and compared to determine internal consistency, factorial structure, and correlations between the test results and other psychological factors. In Exp 3, Ss completed the scale on 2 occasions 4 wks apart. The results were analyzed to determine temporal stability. (English abstract) (PsycINFO Database Record (c) 2017 APA, all rights reserved)