ABSTRACT
Practice evaluation (clinical research, single-subject or single-system or time-series design, N = 1, or idiographic or experimental single-case study) moves the practitioners away from theorizing about
its impact on client individuals, dyads, or any entity that can be conceptualized as a system and for which goals can be expressed and progress can be tracked. If you study the effect of a certain therapy for couple’s counseling, the couple is your system, and you measure how the couple progresses as a couple. If you study the impact of certain interventions on group cohesion, the group is your system, and you measure how the group fares as a group.
