PARRY was an early example of a chatbot, implemented in 1972 by psychiatrist Kenneth Colby.
PARRY was an early example of a chatbot, implemented in 1972 by psychiatrist Kenneth Colby.
==History== PARRY was written in 1972 by psychiatrist Kenneth Colby, then at Stanford University. While ELIZA was a simulation of a Rogerian therapist, PARRY attempted to simulate a person with paranoid schizophrenia. The program implemented a crude model of the behavior of a person with paranoid schizophrenia based on concepts, conceptualizations, and beliefs (judgements about conceptualizations: accept, reject, neutral). It also embodied a conversational strategy, and as such was a much more serious and advanced program than ELIZA. It was described as "ELIZA with attitude".
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).