Third-Wave Cognitive-Behavioral Therapy and the Philosophical Foundations of Psychotherapy: A Comparative Metatheoretical Synthesis

Contemporary psychotherapy is organized across many traditions that differ not just in technique but in their foundational views on reality, knowledge, and the nature of the self. This paper systematically analyzes the third wave of cognitive-behavioral therapy—including Acceptance and Commitment Therapy, Dialectical Behavior Therapy, Mindfulness-Based Cognitive Therapy, Compassion-Focused Therapy, and others—tracing their empirical support and philosophical commitments. It maps the metatheoretical foundations of all major psychotherapeutic traditions across six axes: ontological commitments, epistemological method, theory of the subject, theory of change, therapeutic goal, and philosophical ancestry.

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Abstract

Contemporary psychotherapy is organized across a plurality of traditions that differ not merely in technique but in their foundational commitments to ontology, epistemology, and the theory of the subject. This paper pursues two interrelated objectives. First, it provides a systematic analysis of the third wave of cognitive-behavioral therapy—covering Acceptance and Commitment Therapy (ACT), Dialectical Behavior Therapy (DBT), Mindfulness-Based Cognitive Therapy (MBCT), Compassion-Focused Therapy (CFT), Metacognitive Therapy (MCT), Functional Analytic Psychotherapy (FAP), Behavioral Activation (BA), Radically Open DBT (RO-DBT), the Unified Protocol (UP), and Process-Based Therapy (PBT)—tracing both their empirical standing and their philosophical commitments. Second, it maps the metatheoretical foundations of all major psychotherapeutic traditions—psychoanalytic, behavioral, humanistic-existential, systemic-constructionist, somatic, Jungian, and transpersonal—across six axes: ontological commitments, epistemological method, theory of the subject, theory of change, therapeutic telos, and philosophical ancestry. Twelve cross-cutting philosophical tensions are analyzed: the Dilthey divide between Naturwissenschaften and Geisteswissenschaften, the Ricoeur-Grünbaum debate on psychoanalytic epistemology, one-person versus two-person knowing, essentialism versus constructionism, universalism versus particularism, the ontological plurality of the unconscious across traditions, teleology versus mechanism, the Foucauldian critique of normalization, competing theories of therapeutic truth, Buddhist contemplative philosophy as a transversal foundation, the status of the therapeutic relationship, and the problem of agency and determinism. The paper argues that the most productive current convergence—between network psychopathology, Process-Based Therapy, and the Carhart-Harris–Friston REBUS/canalization framework—supplies a possible computational lingua franca across diverse modalities, while the deeper Dilthey divide remains philosophically unresolved.