Therapy crediting an unlikely new addition rather than established effective therapy
Purple hat therapy refers to any medical practice in which an established form of therapy is mixed with an unlikely new addition (such as wearing a purple hat) and then is claimed to be effective because of the new addition, when in fact the effectiveness is due to the established component.[1]
Origin and description
The term "purple hat therapy" was coined by Gerald Rosen and Gerald Davison in their 2003 paper, Psychology should list empirically supported principles of change (ESPs) and not credential trademarked therapies or other treatment packages.[2] The therapy is accepted as effective because it is assessed overall; the additional element of the "purple hat" is not tested as distinct and does not need to prove its extra worth.[3] Its invention is followed by the publication of papers discussing it and special training courses.[4]
In addition to introducing unnecessary elements into the treatment, purple hat therapies can hinder the scientific understanding of effective treatments for the condition in question.[5]
Mercer J (7 March 2019). "Chapter 12: Trauma and attachment". In Hupp S (ed.). Pseudoscience in Child and Adolescent Psychotherapy: A Skeptical Field Guide. Cambridge University Press. pp. 172–188. ISBN9781107175310.
Neudeck P, Wittchen HU (2012). "Chapter 1: Introduction: Rethinking the Model – Refining the Method". In Neudeck P, Wittchen HU (eds.). Exposure Therapy (1st ed.). Springer. doi:10.1007/978-1-4614-3342-2_1. ISBN978-1-4614-3341-5.
Rosen GM, Davison GC (July 2003). "Psychology should list empirically supported principles of change (ESPs) and not credential trademarked therapies or other treatment packages". Behav Modif. 27 (3): 300–12. doi:10.1177/0145445503027003003. PMID12841586. S2CID19587519.
Rosquist (2005). Exposure Treatments for Anxiety Disorders: A Practitioner's Guide to Concepts, Methods, and Evidence-Based Practice. Routledge. ISBN9781136915772.
Tolin DF (2020). "Advances in the identification of empirically supported psychological treatments". Clinical Psychology: Science and Practice. 27 (4). American Psychological Association (APA). doi:10.1111/cpsp.12356. ISSN1468-2850. S2CID225700536.
Tryon WT (2014). Cognitive Neuroscience And Psychotherapy – Network Principles for a Unified Theory. Elsevier. ISBN9780124200982.