Psychotherapy, placebos, and informed consent.

Area of Science:

• Psychology
• Psychotherapy Research
• Clinical Psychology

Background:

• Recent arguments claim psychotherapy is deceptive due to common factors (e.g., expectancy, therapist effects) driving treatment outcomes.
• This leads to the assertion that psychotherapy is a placebo and practitioners must disclose common factors for informed consent.
• Failure to disclose is argued to undermine patient autonomy.

Purpose of the Study:

• To argue against the claim that psychotherapy practitioners must disclose therapeutic common factors to patients.
• To assert that informed consent does not necessitate disclosure of common factors.
• To demonstrate that common factors are consistent with, not contradictory to, theory-specific psychotherapy mechanisms.

Main Methods:

• Philosophical argumentation and conceptual analysis of psychotherapy ethics and efficacy.
• Examination of the relationship between common factors and theory-specific techniques in psychotherapy.
• Analysis of the requirements for informed consent in therapeutic contexts.

Main Results:

• Informed consent for psychotherapy does not mandate disclosure of common factors.
• Common factors findings are compatible with the efficacy of theory-specific psychotherapies.
• Psychotherapy, as commonly practiced, is not inherently deceptive or a placebo.

Conclusions:

• The call to disclose common factors in psychotherapy should be resisted.
• Disclosing common factors may negatively impact patients by promoting a false understanding of therapy.
• Psychotherapy remains a valid and effective treatment, not solely reliant on placebo effects.