Reference:
Robinson, E. A., & Eyberg, S. M. (1981). The dyadic parent–child interaction coding system: Standardization and validation. Journal of Consulting and Clinical Psychology, 49(2), 245–250. https://doi.org/10.1037/0022-006X.49.2.245
Name and number of scales:
1. Verbalization categories; 2. Vocalization Categories; 3. Response Categories; 4. Physical Categories