Reference:
Buhrmester, D., Furman, W., Wittenberg, M. T., & Reis, H. T. (1988). Five domains of interpersonal competence in peer relationships. Journal of Personality and Social psychology, 55(6), 991.https://doi.org/10.1037//0022-3514.55.6.991
Name and number of scales:
1. Initiation; 2. Negative assertion; 3. Disclosure; 4. Emotional support; 5. Conflict management