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Representational systems (also known as modalities and abbreviated to VAKOG or known as the 4-tuple) is a Neuro-linguistic programming model that examines how the human mind processes information. It states that for practical purposes, information is (or can be treated as if) processed through the senses. Thus people say one talks to oneself (the auditory sense) even if no words are emitted, one makes pictures in one's head when thinking or dreaming (the visual sense), and one considers feelings in the body and emotions (known as the kinesthetic sense).
NLP holds it as crucial in human cognitive processing to recognize that the subjective character of experience is strongly tied into, and influenced by, how memories and perceptions are processed within each sense, in the mind. It considers that expressions such as "It's all misty" or "I can't get a grip on it", can often be precise literal unconscious descriptions from within those sensory systems, communicating unconsciously where the mind perceives a problem in handling some mental event.
Within NLP, the various senses in their role as information processors, are known as representation systems, or modalities. The model itself is known as the VAKOG model (from the initial letters of each of the five senses), or since taste and smell are so closely connected, sometimes as a 4-tuple, meaning its 4 way sensory-based description. A submodality is a structural element of a sensory impression, such as its perceived location, distance, size, or other quality.
Representational systems and submodalities are seen in NLP as offering a valuable therapeutic insight (or metaphor) and potential working methods, into how the human mind internally organizes and subjectively attaches meaning to events.
Representational systems within NLP
Overview of representational systems
|“||At the core of NLP is the belief that, when people are engaged in activities, they are also making use of a representational system; that is, they are using some internal representation of the materials they are involved with, such as a conversation, a rifle shot, a spelling task. These representations can be visual, auditory, kinesthetic, or involve the other senses. In addition, a person may be creating a representation or recalling one. For example, a person asked to spell a word may visualize that word printed on a piece of paper, may hear it being sounded out, or may construct the spelling from the application of a series of logical rules. (pp.138-139)||”|
According to NLP, for many practical purposes mental processing of events and memories can be treated as if performed by the five senses. For example, Einstein credited his discovery of special relativity to a mental visualization strategy of "sitting on the end of a ray of light", and many people as part of decision-making talk to themselves in their heads.
The manner in which this is done, and the effectiveness of the mental strategy employed, is stated by NLP to play a critical part in the way mental processing takes place. This observation led to the concept of a preferred representational system, the classification of people into fixed visual, auditory or kinesthetic stereotypes. This idea was later discredited and dropped within NLP by the early 1980s, in favor of the understanding that most people use all of their senses (whether consciously or unconsciously), and that whilst one system may seem to dominate, this is often contextualized - globally there is a balance that dynamically varies according to circumstance and mood.
NLP asserts that for most circumstances and most people, three of the five sensory based modes that seem to dominate in mental processing:
- visual thoughts - sight, mental imagery, spatial awareness
- auditory (or linguistic) thoughts - sound, speech, dialog, white noise
- kinesthetic (or proprioceptive) sense - somatic feelings in the body, temperature, pressure, and also emotion.
The other two senses, gustatory (taste) and olfactory (smell), which are closely associated, often seem to be less significant in general mental processing, and are often considered jointly as one.
For this reason, one often sees the term VAK in NLP reference texts, to signify these three primary representational systems, as well as the term 4-tuple (or VAKOG) if the author wishes to include all senses including taste/smell. The same term is also known as First Access (John Grinder), or primary experience (Freud).
Notation and strategies
In documenting mental strategies and processing by the senses, NLP practitioners often use a simple shorthand for different modalities, with a letter indicating the repreentation system concerned, and often, a superscript to indicate how that system is being used. Three key aspects are commonly notated: The representation system being used (visual/V, auditory/A, kinesthetic/K, and occasionally, O/G), whether the direction of attention is internal (i) or external (e), and whether the event is a recollection of an actual past event (r) or construction of an imaginary event (c). Due to its importance in human cognitive processing, auditory internal dialogue, or talking in one's head, has its own shorthand: Aid.
Putting these together, this is a very simplified example of some steps which might actually be involved in replying to a simple question such as "Do you like that dress?":
Step Activity Notation What it's being used for 1 auditory external Ae Hear the question 2 visual internal Vi picture to oneself the meaning of the question 3 visual external Ve look at the dress 4 visual internal constructed Vic create a mental image of the dress worn by the person 5 kinesthetic internal Ki get an internal feeling from looking at it 6 auditory internal dialog Aid ask oneself 'Do I like that impression?' 7 auditory external Ae reply
Logically, these or similar steps must take place somewhere in consciousness in order to cognitively make sense of the question and answer it. A sequence of this kind is known in NLP as a strategy - in this case, a functional outline of the strategy used by the mind in answering that question. In a similar way, the process leading to a panic attack of the form "I see the clock, ask myself where the kids are, imagine everything that could be happening and feel scared" might be notated as having a subjective structure: Ve → Aid → Vic → Ki, signifying that an external sight leads to internal dialog (a question), followed by internal and constructed images, leading to a feeling.
It's worth noting that usually, some of these steps (often the most important ones) occur extremely fast, and out of conscious awareness. For example, few people would ordinarily be aware that between question and even considering an answer, there must be steps in which the mind interprets and contextualizes the question itself, and steps which explore various possible strategies to be used to obtain an answer and select one to be followed. The mental occurrence of these steps is often identified by deduction following skilled observation, or by careful inquiry, although their presence is usually self-apparent to the person concerned once noticed.
Eye movements (accessing cues)
Grinder and Bandler identified pattern of relationship between the sensory-based language people use in general conversation, and for example, their eye movements (known as eye accessing cues). 
A common (but not universal) style of processing in the West is shown in the attached chart, where eye flickers in specific directions often seem to tie into specific kinds of internal (mental) processing. NLP also suggests that that sometimes (again not universally), such processing is associated with sensory word use, so for example a person asked what they liked about the beach, may flick their eyes briefly in some characteristic direction (visual memory access, often upwards), and then also use words that describe it in a visual sense ("The sea looked lovely", and so on). Likewise asked about a problem, someone may look in a different direction for a while (kinesthetic access, typically downwards) and then look puzzled and say "I just can't seem to get a grip on things". Taken together, NLP suggests such eye accessing cues (1) are idiosyncratic and habitual for each person, and (2) may form significant clues as to how a person is processing or representing a problem to themselves unconsciously.
Common (but not universal) Western layout of eye accessing cues:
- Upwards (left/right) -- Visual (V) -- "I can imagine the big picture"
- Level (left/right) -- Auditory (A) -- "Let's tone down the discussion"
- Down-right -- Kinesthetic (K) -- "to grasp a concept" or "to gather you've understood."
- Down-left Auditory internal dialogue (Aid) -- talking to oneself inside
Eye movements to the left or right for many people seem to indicate if a memory was recalled or constructed. Thus remembering an actual image (Vr) is associated more with up-left, whilst imagining one's dream home (Vc) tends (again not universally) to be more associated with up-right.
When we think about the world, or about our past experiences, we represent those things inside our heads. For example, think about the holiday you went on last year. Did you see a picture of where you went, tell yourself a story about what you did, feel the sun on your back and the wind in your hair? Can you bring to mind the smell of your favourite flower or the taste of a favourite meal??
The use of the various modalities can be identified based by learning to respond to subtle shifts in breathing, body posture, accessing cues, gestures, eye movements and language patterns such as sensory predicates. 
NLP's interest in the senses is not so much in their role as bridges to the outside world, but in their role as internal channels for cognitive processing and interpretation. In an NLP perspective, it is not very important per se whether a person sees or hears some memory. By contrast, NLP views it as potentially of great importance for the same person, to discover that some auditory sounds presented almost out of consciousness along with the memory, may be how the brain presents to consciousness, and how consciousness knows, whether this is a heart-warming pleasant memory, or a fearsome phobic one.
Representational systems are also relevant since some tasks are more optimally performed within one representational system than by another. For example, within education, spelling is better learned by children who have unconsciously used a strategy of visualization, than an unconscious strategy of phonetical "sounding out". When taught to visualize, previously poor spellers can indeed be taught to improve. NLP proponents also found that pacing and leading the various cues tended to build rapport, and allowed people to communicate more effectively. Certain studies suggest that using similar representational systems to another person can help build rapport[How to reference and link to summary or text], whilst other studies have found that merely mimicking or doing so in isolation is perceived negatively.[How to reference and link to summary or text]
It's also notworthy that a dysfunction such as schizophrenia is in principle just as structured and as capable of modeling as any positive skill, and much valuable information can be learned about how certain people with schizophrenia do key processes in their illnesses by exploring how they use their senses and the strategies employed.
Skinner and Stephens (2003) explored the use the model of representational systems in television marketing and communications.
Some exercises in NLP training involve learning how to observe and respond to the various cues in real time. [How to reference and link to summary or text]
The preferred representational system (PRS)
In a review of research findings, Sharpley (1987) found little support for individuals to have a "preferred" representational system (PRS), whether in the choice of words or direction of eye movements, and the concept of a preferred representation system (PRS). Similarly, The National Research Committee found little support for the influence of PRS as presented in early descriptions of NLP, Frogs into Princes (1979) and Structure of Magic (1975). However, "at a meeting with Richard Bandler in Santa Cruz, California, on July 9, 1986, the [National Research Committee] influence subcommittee... was informed that PRS was no longer considered an important component. He said that NLP had been revised." (p.140) The NLP developers, Robert Dilts et al. (1980) proposed that eye movements (and sometimes gestures) correspond to accessing cues for representations systems, and connected it to specific sides in the brain.
As discussed by Druckman, there are many systems of NLP. While Dilts et al may have deemphasised PRS some trainers have expanded on the notions. For example stereotyping people as "stuck" in a certain style of thinking. For example, visual people talked faster, spoke in a higher pitched voice, whereas kinesthetic people spoke slower and with a deeper timbre.
A literature review by a team from the University of Newcastle upon Tyne identified 71 different theories of learning style. In conducting the review, Coffield and his colleagues selected 13 of the most influential models for closer study, including most of the models cited on this page. The researchers examined the theoretical origins and terms of each model, and the instrument that was purported to assess types of learning style defined by the model. They analyzed the claims made by the author(s), external studies of these claims, and independent empirical evidence of the relationship between the 'learning style' identified by the instrument and students' actual learning.
- Main article: Learning styles
One of the most widely-known theories assessed by Coffield's team was the visual, auditory and kinaesthetic (VAK) learning styles model. The conclusions about the VAK model were unequivocal:
Despite a large and evolving research programme, forceful claims made for impact are questionable because of limitations in many of the supporting studies and the lack of independent research on the model.
Notes and References
- Bandler's Using Your Brain for a Change (Real People Press, 1985)
- Seki's Inner Vision: an Exploration of Art and Brain, OUP, 2000.
- Druckman (1988), Enhancing Human Performance: Issues, Theories, and Techniques
- Grinder, John & Carmen Bostic St Clair (2001.). Whispering in the Wind, 127, 171, 222, ch.3, Appendix, CA: J & C Enterprises. -.
- Bandler, Richard & John Grinder (1979). [- Frogs into Princes: Neuro Linguistic Programming], p.15,24,30,45,52., Moab, UT: Real People Press. -.
- Dilts, Robert B, Grinder, John, Bandler, Richard & DeLozier, Judith A. (1980). [. Neuro-Linguistic Programming: Volume I - The Study of the Structure of Subjective Experience], pp.3-4,6,14,17, Meta Publications, 1980. .. ..
- Dilts, Robert B, DeLozier, Judith A (2000). Encyclopedia of Systemic Neuro-Linguistic Programming and NLP New Coding, p.75, 383, 729, 938-943, 1003, 1300, 1303, NLP University Press. ISBN 0-9701540-0-3.
- Skinner, H. and Stephens, P. (2003). Speaking the Same Language: Exploring the relevance of Neuro-Linguistic Programming to Marketing Communications. Journal of Marketing Communications Volume 9, Number 3 / September: 177-192.
- Sharpley C.F. (1987). Research Findings on Neuro-linguistic Programming: Non supportive Data or an Untestable Theory. Communication and Cognition Journal of Counseling Psychology, 1987 Vol. 34, No. 1: 103-107,105.
- Coffield, F., Moseley, D., Hall, E., Ecclestone, K. (2004). Learning styles and pedagogy in post-16 learning. A systematic and critical review. London: Learning and Skills Research Centre.
- Dunn, R., Dunn, K., & Price, G. E. (1984). Learning style inventory. Lawrence, KS, USA: Price Systems.
- ru:Репрезентативная система