Thinking in terms of a dichotomy between 'internal' processes, on the one hand, and behaviors and events in the 'external' world, on the other, is a pervasive, problematic feature of work in clinical psychology. Although there have been calls for rejecting this approach, it remains far from clear how to move beyond it. The authors address this issue by presenting a framework for participatory accounts. This framework is based on a philosophical perspective that takes as its starting point the person involved in practical activities. It includes five points about substantive and methodological matters. The authors illustrate the participatory approach by discussing a new conceptualization of defense processes called the theory of interpersonal defense in order to (a) show that going beyond the internal-external dichotomy can lead to fresh insights in a substantive area of inquiry, and (b) provide an example that can serve as a guide for investigators interested in approaching other issues in clinical psychology in a manner based on the participatory framework.KEY WORDS: Cartesian framework, defenses, discourse, dysfunctional interpersonal behavior, internal-external dichotomy, hermeneutics, limits of inquiry, participatory accounts, practices, self-fulfilling prophecies …a move in chess doesn't consist simply in moving a piece in such-and-such a way on the board-nor yet in one's thoughts and feelings as one makes the move: but in the circumstances that we call 'playing a game of chess, ' 'solving a chess problem,' and so on. (Wittgenstein, 1958, §33) The internal-external dichotomy appears pervasively in theory, research, and practice in clinical psychology. Investigators and clinicians refer again and again to 'inner' thoughts, feelings, beliefs, and conflicts, and to 'outer' behaviors and 'external' stimuli. Indeed, this framework, which is generally attributed THEORY & PSYCHOLOGY