Neuro-linguistic programming (NLP) is a pseudoscientific approach to communication, personal development, and psychotherapy that first appeared in Richard Bandler and John Grinder's book The Structure of Magic I (1975). NLP asserts a connection between neurological processes, language, and acquired behavioral patterns, and that these can be changed to achieve specific goals in life. According to Bandler and Grinder, NLP can treat problems such as phobias, depression, tic disorders, psychosomatic illnesses, near-sightedness, allergy, the common cold, and learning disorders, often in a single session. They also say that NLP can model the skills of exceptional people, allowing anyone to acquire them. NLP has been adopted by some hypnotherapists as well as by companies that run seminars marketed as leadership training to businesses and government agencies. No scientific evidence supports the claims made by NLP advocates, and it has been called a pseudoscience. Scientific reviews have shown that NLP is based on outdated metaphors of the brain's inner workings that are inconsistent with current neurological theory, and that NLP contains numerous factual errors. Reviews also found that research that favored NLP contained significant methodological flaws, and that three times as many studies of a much higher quality failed to reproduce the claims made by Bandler, Grinder, and other NLP practitioners.
Early development According to Bandler and Grinder, NLP consists of a methodology termed modeling, plus a set of techniques that they derived from its initial applications. They derived many of the fundamental techniques from the work of Virginia Satir, Milton Erickson and Fritz Perls. Bandler and Grinder also drew upon the theories of Gregory Bateson, and Noam Chomsky (particularly transformational grammar). Bandler and Grinder say that their methodology can codify the structure inherent to the therapeutic "magic" as performed in therapy by Perls, Satir and Erickson, and indeed inherent to any complex human activity. From that codification, they say, the structure and its activity can be learned by others. Their 1975 book, The Structure of Magic I: A Book about Language and Therapy, is intended to be a codification of the therapeutic techniques of Perls and Satir. Bandler and Grinder say that they used their own process of modeling to model Virginia Satir so they could produce what they termed the Meta-Model, a model for gathering information and challenging a client's language and underlying thinking. They say that by challenging linguistic distortions, specifying generalizations, and recovering deleted information in the client's statements, the transformational grammar concept of surface structure yields a more complete representation of the underlying deep structure and therefore has therapeutic benefit. Also derived from Satir were anchoring, future pacing and representational systems. In contrast, the Milton-Model—a model of the purportedly hypnotic language of Milton Erickson—was described by Bandler and Grinder as "artfully vague" and metaphoric. The Milton-Model is used in combination with the Meta-Model as a softener, to induce "trance" and to deliver indirect therapeutic suggestion. Psychologist Jean Mercer writes that Chomsky's theories "appear to be irrelevant" to NLP. Linguist Karen Stollznow describes Bandler's and Grinder's reference to such experts as namedropping. Other than Satir, the people they cite as influences did not collaborate with Bandler or Grinder. Chomsky himself has no association with NLP, with his work being theoretical in nature and having no therapeutic element. Stollznow writes, "[o]ther than borrowing terminology, NLP does not bear authentic resemblance to any of Chomsky's theories or philosophies—linguistic, cognitive or political." According to André Muller Weitzenhoffer, a researcher in the field of hypnosis, "the major weakness of Bandler and Grinder's linguistic analysis is that so much of it is built upon untested hypotheses and is supported by totally inadequate data." Weitzenhoffer adds that Bandler and Grinder misuse formal logic and mathematics, redefine or misunderstand terms from the linguistics lexicon (e.g., nominalization), create a scientific façade by needlessly complicating Ericksonian concepts with unfounded claims, make factual errors, and disregard or confuse concepts central to the Ericksonian approach. More recently, Bandler has stated, "NLP is based on finding out what works and formalizing it. In order to formalize patterns I utilized everything from linguistics to holography ... The models that constitute NLP are all formal models based on mathematical, logical principles such as predicate calculus and the mathematical equations underlying holography." There is no mention of the mathematics of holography nor of holography in general in Spitzer's, or Grinder's account of the development of NLP. On the matter of the development of NLP, Grinder recollects:
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