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.
"[15] 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.
"[24] Weitzenhoffer adds that Bandler and Grinder misuse formal logic and mathematics,[25] redefine or misunderstand terms from the linguistics lexicon (e.g., nominalization),[c] create a scientific façade by needlessly complicating Ericksonian concepts with unfounded claims,[d] make factual errors,[e] and disregard or confuse concepts central to the Ericksonian approach.
On the matter of the development of NLP, Grinder recollects: My memories about what we thought at the time of discovery (with respect to the classic code we developed—that is, the years 1973 through 1978) are that we were quite explicit that we were out to overthrow a paradigm and that, for example, I, for one, found it very useful to plan this campaign using in part as a guide the excellent work of Thomas Kuhn (The Structure of Scientific Revolutions) in which he detailed some of the conditions which historically have obtained in the midst of paradigm shifts.
For example, I believe it was very useful that neither one of us were qualified in the field we first went after—psychology and in particular, its therapeutic application; this being one of the conditions which Kuhn identified in his historical study of paradigm shifts.
[28]The philosopher Robert Todd Carroll responded that Grinder has not understood Kuhn's text on the history and philosophy of science, The Structure of Scientific Revolutions.
Bandler and Grinder have said that in addition to being a therapeutic method, NLP was also a study of communication and began marketing it as a business tool, writing that, "if any human being can do anything, so can you.
"[17] After 150 students paid $1,000 each for a ten-day workshop in Santa Cruz, California, Bandler and Grinder gave up academic writing and started producing popular books from seminar transcripts, such as Frogs into Princes, which sold more than 270,000 copies.
[17] A community of psychotherapists and students began to form around Bandler and Grinder's initial works, leading to the growth and spread of NLP as a theory and practice.
[30] For example, Tony Robbins trained with Grinder and utilized a few ideas from NLP as part of his own self-help and motivational speaking programmes.
When we imagine something, recall an event, or think about the future, we utilize these same sensory systems within our minds[32][g] Furthermore it is stated that these subjective representations of experience have a discernible structure, a pattern.
According to Bandler and Grinder, by analyzing the sequence of sensory and linguistic representations used by an expert while performing a skill, it's possible to create a mental model that can be learned by others.
[36] According to one study by Steinbach,[37] a classic interaction in NLP can be understood in terms of several major stages including establishing rapport, gleaning information about a problem mental state and desired goals, using specific tools and techniques to make interventions, and integrating proposed changes into the client's life.
[37] The client is typically encouraged to consider the consequences of the desired outcome, and how they may affect his or her personal or professional life and relationships, taking into account any positive intentions of any problems that may arise.
[37] The practitioner thereafter assists the client in achieving the desired outcomes by using certain tools and techniques to change internal representations and responses to stimuli in the world.
[41] People who use NLP as a form of treatment risk serious adverse health consequences as it can delay the provision of effective medical care.
As an approach to psychotherapy, NLP shares similar core assumptions and foundations in common with some contemporary brief and systemic practices,[42][43][44] such as solution focused brief therapy.
[51] According to Stollznow, "Bandler and Grinder's infamous Frogs into Princes and their other books boast that NLP is a cure-all that treats a broad range of physical and mental conditions and learning difficulties, including epilepsy, myopia and dyslexia.
With its promises to cure schizophrenia, depression and Post Traumatic Stress Disorder, and its dismissal of psychiatric illnesses as psychosomatic, NLP shares similarities with Scientology and the Citizens Commission on Human Rights (CCHR).
"[15] A systematic review of experimental studies by Sturt et al. (2012) concluded that "there is little evidence that NLP interventions improve health-related outcomes.
"[54] André Muller Weitzenhoffer—a friend and peer of Milton Erickson—wrote, "Has NLP really abstracted and explicated the essence of successful therapy and provided everyone with the means to be another Whittaker, Virginia Satir, or Erickson?
He offers Walt Disney, Isaac Newton and J.K. Rowling as three examples of unambiguous acknowledged personal failure that served as an impetus to great success.
These applications include persuasion,[58] sales,[59] negotiation,[60] management training,[61] sports,[62] teaching, coaching, team building, public speaking, and in the process of hiring employees.
Bovbjerg posits that this emphasis on the unconscious and its hidden potential underlies NLP techniques promoting self-perfection through ongoing transformation.
[103] Bandler commenced further civil actions against Unlimited Ltd., various figures within the NLP community, and 200 initially unnamed defendants in July 1996 and January 1997.
[104][105] In December 1997, a separate civil proceeding initiated by Tony Clarkson resulted in the revocation of Bandler's UK trademark of NLP.
[106][107] Bandler and Grinder reached a settlement in late 2000, acknowledging their status as co-creators and co-founders of NLP and committing to refrain from disparaging one another's NLP-related endeavors.
Critics like Karen Stollznow find irony in the initial legal battles between Bandler and Grinder, considering their failure to apply their own NLP principles to resolve their conflict.
[15] Others, such as Grant Devilly, characterize NLP associations as "granfalloons"—a term implying a lack of unifying principles or a shared sense of purpose.