number form
   The term number form was introduced in or shortly before 1880 by the British scientist Sir Francis Galton (1822-1911) to denote a mental map or configuration of numbers which may appear automatically and involuntarily whenever one thinks of numbers. As observed by Galton, some individuals are capable of conjuring up numerals with a greater or lesser degree of vividness: "Persons who are imaginative almost invariably think of numerals in some form of visual imagery. If the idea of six occurs to them, the word 'six' does not sound in their mental ear, but the figure 6 in a written or printed form rises before their mental eye... There are a few persons in whom the visualising faculty is so low that they can mentally see neither numerals nor anything else; and... there are a few in whom it is so high as to give rise to hallucinations. Those who are able to visualise a numeral with a distinctness comparable to reality, and not in some sort of dreamland, will define the direction in which it seems to lie, and the distance at which it appears to be." In some individuals, Galton found these numerals to be arranged in a peculiar configuration or 'number form'. As he wrote, "The peculiarity in question... consists in the sudden and automatic appearance of a vivid and invariable 'form' in the mental field of view, whenever a numeral is thought of in which each number has its own definite place. This Form may consist of a mere line of any shape, of a peculiarly arranged row or rows of figures, or of a shaded place... The Forms are sometimes variously coloured, occasionally very brilliantly. In all of these the definition and illumination vary much in different parts. Usually the Forms fade away into distinctness after 100; sometimes they come to a dead stop." Galton was under the impression that the capacity to conjure up number forms constitutes an inheritable trait, occurring in about 1 out of 30 adult males, and in 1 out of 15 females, most of whom developed this capacity during childhood. Today number forms are conceptualized as a special form of * synaesthesia, called * number-form synaesthesia. They are classified as a type of * synaesthetic configuration and should not be confused with * grapheme-colour synaesthesia. Pathophysiologically, the mediation of number forms is associated primarily with * cross-activation between regions of the parietal lobe that are involved in numerical cognition and spatial cognition. For other pathophysiological hypotheses, see the entry Synaesthesia.
   References
   Galton, F. (1880). Visualised numerals. Nature, 21, 252-256.
   Galton, F. (1883). Inquiries into human faculty and its development. London: J.M. Dent & Sons.
   Ramachandran, V.S., Hubbard, E.M. (2001). Synaesthesia - A window into perception, thought and language. Journal ofConscious-ness Studies, 8, 3-34.

Dictionary of Hallucinations. . 2010.

Look at other dictionaries:

  • Number form — This article refers to the neurological phenomenon. For Unicode numbers, see Number Forms. A number form from one of Francis Galton s (1881b) subjects. Note the convolutions, and how the first 12 digits correspond to a clock face. A number form… …   Wikipedia

  • number-form synaesthesia —    A term used to denote a type of * synaesthesia characterized by the automatic and involuntary appearance of a mental map or configuration of numbers whenever one thinks of numbers. These maps or configurations, referred to as * number forms,… …   Dictionary of Hallucinations

  • Number line — For other uses, see Number line (disambiguation). In basic mathematics, a number line is a picture of a straight line on which every point is assumed to correspond to a real number and every real number to a point.[1] Often the integers are shown …   Wikipedia

  • Number prefix — Number prefixes are prefixes derived from numbers or numerals. In English and other European languages, they are used to coin numerous series of words, such as unicycle – bicycle – tricycle, dyad – triad – decade, biped – quadruped, September –… …   Wikipedia

  • Number Six (Battlestar Galactica) — Number Six Battlestar Galactica character Promotional still of Number Six in season four First appearance …   Wikipedia

  • Form criticism — is a method of biblical criticism that classifies units of scripture by literary pattern (such as parables or legends) and that attempts to trace each type to its period of oral transmission. [ form criticism. Encyclopædia Britannica. 2007.… …   Wikipedia

  • Number Girl — Origin  Japan, Fukuoka Genres Alternative rock, post hardcore, indie rock …   Wikipedia

  • number — or [num′bər] n. [ME nombre < OE < L numerus: see NOMY] 1. a symbol or word, or a group of either of these, showing how many or which one in a series: 1, 2, 10, 101 (one, two, ten, one hundred and one) are called cardinal numbers; 1st, 2d,… …   English World dictionary

  • Form classification — is the classification of organisms based on their morphology, which does not necessarily reflect their biological relationships. Form classification, generally restricted to palaeontology, reflects uncertainty; the goal of science is to move form …   Wikipedia

  • Number Six (The Prisoner) — Number Six is the central fictional character in the 1960s television series The Prisoner, played by Patrick McGoohan. In the AMC remake, the character is played by Jim Caviezel, renamed Six . In several episodes, his attempts to escape his… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”