Estimation of longitudinal associations between group climate and therapeutic factors as reported by members of interpersonally focused counselor-training groups should take into account data dependencies within sessions within groups. Thirty-six participants assigned to 4 groups completed the Group Climate Questionnaire—Short Form (GCQ–S; K. R. MacKenzie, 1983, The clinical application of a group climate measure, in R. R. Dies & K. R. MacKenzie, Eds., Advances in group psychotherapy: Integrating research and practice, Madison, CT: International Universities Press, pp. 159–170) and submitted critical incident narratives rated by 3 independent judges on I. D. Yalom’s (1995, The theory and practice of group psychotherapy, 4th ed., New York, NY: Basic Books) therapeutic factors as operationalized by S. Bloch, J. Reibstein, E. Crouch, P. Holroyd, and J. Themen (1979, A method for the study of therapeutic factors in group psychotherapy, British Journal of Psychiatry, Vol. 134, pp. 257–263). The GCQ–S Conflict dimension, aggregated across group members, correlated with aggregated therapeutic factors: positively with Learning Through Interpersonal Actions, negatively with Acceptance, and negatively with Universality. The aggregated GCQ–S Engaged dimension positively associated with only 1 aggregated therapeutic factor, Altruism. The aggregated GCQ–S Avoiding dimension did not correlate with any of the aggregated therapeutic factors. Because members’ perceptions of group climate dimensions differentially correlated with their endorsement of therapeutic factors within sessions versus between groups, we recommend that longitudinal studies of counseling and therapy groups, regardless of what measures are used to track changes in therapeutic processes and outcomes over time, should account for data dependencies at different levels of analysis to more reliably estimate the total variation found at the session level.