JAMA+ AI Conversations Chatting With a Chatbot: The History of the First Clinical Chatbots, Straight From an LLM
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Jan 29, 2026 Frontier Large Language Model, a voice-mode LLM that narrates and analyzes AI history. It recounts ELIZA's simple therapist mimicry and PARRY's scripted paranoid persona. The discussion covers early psychotherapy scripts, ethical concerns from Weizenbaum, clashes over replacement vs augmentation, and lessons for designing humane clinical chatbots.
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Simple Rules Can Feel Human
- ELIZA used simple pattern matching to create the illusion of a psychotherapist by reflecting user input back to them.
- This early design showed that basic programs can make people feel they converse with something nearly human.
Colby's PERRY Modeled Paranoia
- Kenneth Colby built PERRY to simulate a person with paranoid schizophrenia and explored modeling specific mental states.
- PERRY represented a shift from generic conversation toward psychologically nuanced personalities.
Scripted Therapy Preceded Personality Models
- Colby's 1966 paper described scripted therapy run by computers as a precursor to later chatbots.
- He framed such systems as structured, therapeutic scripts rather than open-ended conversation engines.
