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A mental image is an experience that significantly resembles the experience of perceiving some object, event, or scene, but that occurs when the relevant object, event, or scene is not actually present to the senses (McKellar, 1957; Richardson,1969; Finke, 1989; Thomas, 2003). The nature of these experiences, what makes them possible, and their function (if any) have long been subjects of research and controversy in philosophy, psychology, cognitive science and, more recently, neuroscience. As contemporary researchers use the expression, mental images (or mental imagery) can occur in any sense mode, so that we may experience auditory images (Reisberg, 1992), olfactory images (Bensafi et al., 2003), and so forth. However, the vast majority of philosophical and scientific investigations of the topic focus upon visual mental imagery. It is assumed[How to reference and link to summary or text] that, like humans, many types of animal are capable of experiencing mental images. However, owing to the fundamentally subjective nature of the phenomenon, evidence either for or against this assumption is lacking.

Philosophers such as Berkeley, and Hume, and early experimental psychologists, such as Wundt and James, understood ideas in general to be mental images, and today it is very widely believed that images function as mental representations (or mental models), playing an important role in memory and thinking (Paivio, 1986; Egan, 1992; Barsalou, 1999; Prinz, 2002). Indeed, some have gone so far as to suggest that images are best understood as by definition a form of inner, mental or neural representation (Block, 1983; Kosslyn, 1983). Others, however, reject the view that the image experience may be identical with (or directly caused by) any such representation in the mind or the brain (Sartre, 1940; Ryle, 1949; Skinner, 1974; Thomas, 1999; Bartolomeo, 2002; Bennett & Hacker, 2003).

How mental images form in the brainEdit

Have you ever wondered why you seem to get a mental picture of something happening when you are reading a book? Or maybe when you have a daydream? These images appear like pictures in your mind. For example, when a musician hears a song they can sometimes "see" the song notes in their head. This is considered different from an after-effect, such as an after-image. Calling up an image in our minds can be a voluntary act, so it can be characterized as being under various degrees of conscious control.

According to some biologists[How to reference and link to summary or text] our experiences of the world are stored as mental images. These mental images can then be associated and compared with other mental images, and can be used to synthesize completely new images. Some believe that this process allows us to form useful theories of how the world works based on likely sequences of mental images, without having to directly experience that outcome, for example through the processes of deduction or simulation. Whether other creatures have this capability is debated.

Philosophical ideas about mental imagesEdit

Philosophers have written extensively about the nature and significance of imagery.

Main article: Philosophy and imagery

Mental Imagery in Experimental PsychologyEdit

Cognitive psychologists and (later) cognitive neuroscientists have empirically tested some of the philosophical questions related to whether and how the human brain uses mental imagery in cognition.

One related theory of the mind that was examined in these experiments was the "brain as serial computer" philosophical metaphor of the 70s. Psychologist Zenon Pylyshyn theorized that the human mind processes mental images by decomposing them into an underlying mathematical proposition. Roger Shepard and Jacqueline Metzler (1971) challenged that view by presenting subjects with 2D line drawings of groups of 3D block "objects" and asking them to determine whether that "object" was the same as a second figure, some of which were rotations of the first "object". Shepard and Metzler proposed that if we decomposed and then mentally re-imaged the objects into basic mathematical propositions, as the then-dominant view of cognition "as a serial digital computer" (Gardner 1987) assumed, then it would be expected that the time it took to determine whether the object was the same or not would be independent of how much the object was rotated. Shepard and Metzler found the opposite; a linear relationship between the degree of rotation in the mental imagery task and the time it took participants to reach their answer.

This mental rotation finding implied that the human mind — and the human brain — maintains and manipulates mental images as topographic and topological wholes, an implication that was quickly put to test by psychologists. Kosslyn and colleagues (1995; see also 1994) showed in a series of neuroimaging experiments that the mental image of objects like the letter "F" are mapped, maintained and rotated as an image-like whole in areas of the human visual cortex. Moreover, Kosslyn's work showed that there were considerable similarities between the neural mappings for imagined stimuli and perceived stimuli. The authors of these studies concluded that while the neural processes they studied rely on mathematical and computational underpinnings, the brain also seems optimized to handle the sort of mathematics that constantly computes a series of topologically-based images rather than calculating a mathematical model of an object.

Recent studies in neurology and neuropsychology on mental imagery have further questioned the "mind as serial computer" theory, arguing instead that human mental imagery is both visually and motorically embodied. For example, several studies provided evidence that people are slower at rotating line drawings of objects such as hands in directions incompatible with the joints of the human body (Parsons 1987; 2003), and that patients with painful injured arms are slower at mentally rotating line drawings of the hand from the side of the injured arm (Schwoebel et al. 2001).

Some psychologists, including Stephen Kosslyn, have argued that such results occur because of interference in the brain between distinct systems in the brain that process the visual and motoric mental imagery. Subsequent neuroimaging studies (Kosslyn et al. 2001) showed that the interference between the motoric and visual imagery system could be induced by having participants physically handle actual 3D blocks glued together to form objects similar to those depicted in the line-drawings. However, Amorim et al. (2006) have recently showed that when a cylindrical "head" was added to Shepard and Metzler's line drawings of 3D block figures, participants were quicker and more accurate at solving mental rotation problems. They argue that motoric embodiment is not just "interference" that inhibits visual mental imagery, but is capable of facilitating mental imagery.

These and numerous related studies have led to a relative consensus within cognitive science, psychology, neuroscience and philosophy on the neural status of mental images. Researchers generally agree that while there is no homunculus inside the head viewing these mental images, our brains do form and maintain mental images as image-like wholes (Rohrer 2006). The problem of exactly how these images are stored and manipulated within the human brain, particularly within language and communication, remains a fertile area of study.

One of the longest running research topics on the mental image has been the fact that people report large individual differences in the vividness of their images. Special questionnaires have been developed to assess such differences, including the Vividness of Visual Imagery Questionnaire (VVIQ) developed by David Marks. Labaoratory studies have suggested that the subjectively reported variations in imagery vividness are associated with different neural states within the brain and also different cognitive competences such as the ability to accurately recall information presented in pictures (Marks, 1973). Rodway, Gillies and Schepman (2006) used a novel long-term change detection task to determine whether participants with low and high vividness scores on the VVIQ2 showed any performance differences. Rodway et al. (2006) found that high vividness participants were significantly more accurate at detecting salient changes to pictures compared to low vividness participants. This replicated an earlier study by Gur and Hilgard (1975).

Recent studies have found that individual differences in VVIQ scores can be used to predict changes in a person's brain while visualizing different activities. Cui et al. (2007) used functional magnetic resonance imaging (fMRI) to study the association between early visual cortex activity relative to the whole brain while participants visualised themselves or another person bench pressing or stair climbing. Reported image vividness correlates significantly with the relative fMRI signal in the visual cortex. Thus individual differences in the vividness of visual imagery can be measured objectively.

Neurobiology of imageryEdit

Research areas concerned with imagery include cognitive neuroscience, and sport/exercise/dance psychology. Research has shown that imagery does not have a unified biological basis in the brain, but is rather considered as a collection of different functions situated in various parts of the cerebral hemispheres.[citation needed]

Main article: Neurobiology of imagery

Training and Learning StylesEdit

Some educational theorists have drawn from the idea of mental imagery in their studies of learning styles. Proponents of these theories state that people often have learning processes which emphasize visual, auditory, and kinesthetic systems of experience[How to reference and link to summary or text]. According to these theorists, teaching in multiple overlapping sensory systems benefits learning and they encourage teachers to use content and media that integrates well with the visual, auditory, and kinesthetic systems whenever possible. Examples of these teaching methods include spoken components with a whiteboard or overheads.

Educational researchers have examined whether the experience of mental imagery affects the degree of learning. For example, imagining playing a 5-finger piano exercise (mental practice) resulted in a significant improvement in performance over no mental practice — though not as significant as that produced by physical practice and the authors of the study stated that "mental practice alone seems to be sufficient to promote the modulation of neural circuits involved in the early stages of motor skill learning." (Pascual-Leone et al 1995).

Psychiatric ideas about mental imagesEdit

Mental images, and particular images from dreams, are the basis for the theories of Sigmund Freud about human behavior. His basic thesis was that our childhood experiences strongly influence the mental images that we make in later life. He believed that humans form mental images in the unconscious according to their "latent" desires and they are not aware of them in their conscious mind although, according to Freud, they have a major influence on human behavior.

Mental imagery, visualisation and the Himalayan traditionsEdit

Vajrayana Buddhism, Bön and Tantra in general, utilize sophisticated visualization or 'imaginal' (in the language of Jean Houston of Transpersonal Psychology) processes in the thoughtform construction of the yidam sadhana, and kye-rim and dzog-rim modes of meditation and in the yantra, thangka and mandala traditions, where holding the fully realized form in the mind is a prerequisite prior to creating an 'authentic' new art work that will provide a sacred support or foundation for deity.[1]

See alsoEdit


  1. This statement needs sourcing. To start refer The Dalai Lama at MIT (2006) & Mental Imagery.


  • Amorim, Michel-Ange, Brice Isableu and Mohammed Jarraya (2006) Embodied Spatial Transformations: “Body Analogy” for the Mental Rotation. Journal of Experimental Psychology: General.
  • Bartolomeo, P. (2002). The Relationship Between Visual perception and Visual Mental Imagery: A Reappraisal of the Neuropsychological Evidence. Cortex 38: 357-378. Cortex open access archive
  • Bennett, M.R. & Hacker, P.M.S. (2003). Philosophical Foundations of Neuroscience. Oxford: Blackwell.
  • Bensafi, M., Porter, J., Pouliot, S., Mainland, J., Johnson, B., Zelano, C., Young, N., Bremner, E., Aframian, D., Kahn, R., & Sobel, N. (2003). Olfactomotor Activity During Imagery Mimics that During Perception. Nature Neuroscience 6: 1142-1144.
  • Block, N. (1983). Mental Pictures and Cognitive Science. Philosophical Review 92: 499-539.
  • Cui, X., Jeter, C.B., Yang, D., Montague, P.R.,& Eagleman, D.M. (2007). "Vividness of mental imagery: Individual variability can be measured objectively". Vision Research, 47, 474-478.
  • Egan, Kieran (1992). Imagination in Teaching and Learning. Chicago: University of Chicago Press.
  • Finke, R.A. (1989). Principles of Mental Imagery. Cambridge, MA: MIT Press.
  • Garnder, Howard. (1987) The Mind's New Science: A History of the Cognitive Revolution New York: Basic Books.
  • Gur, R.C. & Hilgard, E.R. (1975). "Visual imagery and discrimination of differences between altered pictures simultaneously and successively presented". British Journal of Psychology, 66, 341-345.
  • Kosslyn, Stephen M. (1983). Ghosts in the Mind's Machine: Creating and Using Images in the Brain. New York: Norton.
  • Kosslyn, Stephen (1994) Image and Brain: The Resolution of the Imagery Debate. Cambridge, MA: MIT Press.
  • Kosslyn, Stephen M., William L. Thompson, Irene J. Kim and Nathaniel M. Alpert (1995) Topographic representations of mental images in primary visual cortex. Nature 378: 496-8.
  • Kosslyn, Stephen M., William L. Thompson, Mary J. Wraga and Nathaniel M. Alpert (2001) Imagining rotation by endogenous versus exogenous forces: Distinct neural mechanisms. NeuroReport 12, 2519-2525
  • Marks, D.F. (1973). "Visual imagery differences in the recall of pictures". British Journal of Psychology, 64, 17-24.
  • Marks, D.F. (1995). "New directions for mental imagery research". Journal of Mental Imagery, 19, 153-167.
  • McGabhann. R, Squires. B, 2003, 'Releasing The Beast Within — A path to Mental Toughness', Granite Publishing, Australia.
  • McKellar, Peter (1957). Imagination and Thinking. London: Cohen & West.
  • Paivio, Allan (1986). Mental Representations: A Dual Coding Approach. New York: Oxford University Press.
  • Parsons, Lawrence M. (1987) Imagined spatial transformations of one’s hands and feet. Cognitive Psychology 19: 178-241.
  • Parsons, Lawrence M. (2003) Superior parietal cortices and varieties of mental rotation. Trends in Cognitive Science 7: 515-551.
  • Pascual-Leone, Alvaro, Nguyet Dang, Leonardo G. Cohen, Joaquim P. Brasil-Neto, Angel Cammarota, and Mark Hallett (1995). Modulation of Muscle Responses Evoked by Transcranial Magnetic Stimulation During the Acquisition of New Fine Motor Skills. Journal of Neuroscience [1]
  • Prinz, J.J. (2002). Furnishing the Mind: Concepts and their Perceptual Basis. Boston, MA: MIT Press.
  • Pylyshyn, Zenon W. (1973). What the mind’s eye tells the mind’s brain: a critique of mental imagery. Psychological Bulletin 80: 1-24
  • Reisberg, Daniel (Ed.) (1992). Auditory Imagery. Hillsdale, NJ: Erlbaum.
  • Richardson, A. (1969). Mental Imagery. London: Routledge & Kegan Paul.
  • Rodway, P., Gillies, K. & Schepman, A. (2006). "Vivid imagers are better at detecting salient changes". Journal of Individual Differences 27: 218-228.
  • Rohrer, T. (2006). The Body in Space: Dimensions of embodiment The Body in Space: Embodiment, Experientialism and Linguistic Conceptualization]. In Body, Language and Mind, vol. 2. Zlatev, Jordan; Ziemke, Tom; Frank, Roz; Dirven, René (eds.). Berlin: Mouton de Gruyter, forthcoming 2006.
  • Ryle, G. (1949). The Concept of Mind. London: Hutchinson.
  • Sartre, J.-P. (1940). The Psychology of Imagination. (Translated from the French by B. Frechtman, New York: Philosophical Library, 1948.)
  • Schwoebel, John, Robert Friedman, Nanci Duda and H. Branch Coslett (2001). Pain and the body schema evidence for peripheral effects on mental representations of movement. Brain 124: 2098-2104.
  • Skinner, B.F. (1974). About Behaviorism. New York: Knopf.
  • Shepard, Roger N. and Jacqueline Metzler (1971) Mental rotation of three-dimensional objects. Science 171: 701-703.

External linksEdit

  • Roadmind University The Roerich Psychodynamic Inventory (RPI) provides statisical data to determine the validity of mental imagery for cognition of the minds raw emotional state. (Dr. Robert Roerich MD.)
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