The present article examines the role of diagnosis and case formulation in humanistic psychotherapies. The diversity of approaches within the humanistic paradigm is addressed, including person-centered therapy, gestalt therapy, existential therapy, and emotion-focused therapy. Additionally, specific case formulation models developed within these traditions are explored, providing examples of generic and integrative case formulation proposals and specific models from numerous humanistic schools. Furthermore, methods of case formulation specifically developed for research in humanistic psychotherapy are presented, including the hermeneutic single-case efficacy design method and multiple-case depth research method. The article concludes by emphasizing the commitment of humanistic psychotherapies to research and ethical standards, highlighting the need to critically evaluate the effectiveness and relevance of diagnosis and case formulation processes.
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