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MIT Encyclopedia of the Cognitive Sciences - Cryptome

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and similar form, which suggests <strong>the</strong>y have a common function;<br />

an attractive hypo<strong>the</strong>sis is that this is prediction.and<br />

Sense organs are slow, but an animal’s competitive survival<br />

<strong>of</strong>ten depends upon speedy response; <strong>the</strong>refore, a representation<br />

that is up to <strong>the</strong> moment, or even ahead <strong>of</strong> <strong>the</strong><br />

moment, would be <strong>of</strong> very great advantage. Prediction<br />

depends upon identifying a commonly occurring sequential<br />

pattern <strong>of</strong> events at an early stage in <strong>the</strong> sequence and<br />

assuming that <strong>the</strong> pattern will be completed. This requires<br />

knowledge <strong>of</strong> <strong>the</strong> spatio-temporal sequences that commonly<br />

occur, and <strong>the</strong> critical or sensitive periods, which neurophysiologists<br />

have studied in <strong>the</strong> visual cortex (Hubel and<br />

Wiesel 1970; Movshon and Van Sluyters 1981) but which<br />

are also known to occur in <strong>the</strong> development <strong>of</strong> o<strong>the</strong>r cognitive<br />

systems, may be periods when spatio-temporal<br />

sequences that occur commonly encourage <strong>the</strong> development<br />

<strong>of</strong> neurons with a selectivity <strong>of</strong> response to <strong>the</strong>se patterns. If<br />

such phase sequences, as HEBB (1949) called <strong>the</strong>m, were<br />

recognized by individual cells, one would have a computational<br />

unit that, with appropriate connections, would be <strong>of</strong><br />

selective advantage in an enormous range <strong>of</strong> circumstances.<br />

The survival value <strong>of</strong> neurons with <strong>the</strong> power <strong>of</strong> prediction<br />

could have led to <strong>the</strong> explosive enlargement <strong>of</strong> <strong>the</strong> neocortex<br />

that culminated in <strong>the</strong> human brain.<br />

See also ADAPTATION AND ADAPTATIONISM; CORTICAL<br />

LOCALIZATION, HISTORY OF; EVOLUTION; HEMISPHERIC SPE-<br />

CIALIZATION; NEURON<br />

——Horace Barlow<br />

References<br />

Barlow, H. B. (1981). Critical limiting factors in <strong>the</strong> design <strong>of</strong> <strong>the</strong><br />

eye and visual cortex. The Ferrier Lecture, 1980. Proceedings<br />

<strong>of</strong> <strong>the</strong> Royal Society, London Series B 212: 1–34.<br />

Barlow, H. B. (1994). What is <strong>the</strong> computational goal <strong>of</strong> <strong>the</strong> neocortex?<br />

In C. Koch and J. Davis, Eds., Large Scale Neuronal<br />

Theories <strong>of</strong> <strong>the</strong> Brain. Cambridge, MA: <strong>MIT</strong> Press.<br />

Braitenberg, V., and A. Schuz. (1991). Anatomy <strong>of</strong> <strong>the</strong> Cortex: Statistics<br />

and Geometry. Berlin: Springer-Verlag.<br />

Hebb, D. O. (1949). The Organisation <strong>of</strong> Behaviour. New York:<br />

Wiley.<br />

Herrick, C. J. (1926). Brains <strong>of</strong> Rats and Men. Chicago: University<br />

<strong>of</strong> Chicago Press.<br />

Hubel, D. H., and T. N. Wiesel. (1970). The period <strong>of</strong> susceptibility<br />

to <strong>the</strong> physiological effects <strong>of</strong> unilateral eye closure in kittens.<br />

Journal <strong>of</strong> Physiology 206: 419–436.<br />

Jerison, H. J. (1973). Evolution <strong>of</strong> <strong>the</strong> Brain and Intelligence. New<br />

York: Academic Press.<br />

Macphail, E. (1982). Brain and Intelligence in Vertebrates. New<br />

York: Oxford University Press.<br />

Movshon, J. A., and R. C. Van Sluyters. (1981). Visual neural<br />

development. Annual Review <strong>of</strong> Psychology 32: 477–522.<br />

Phillips, C. G., S. Zeki, and H. B. Barlow. (1984). Localisation <strong>of</strong><br />

function in <strong>the</strong> cerebral cortex. Brain 107: 327–361.<br />

Sarnat, H. B., and M. G. Netsky. (1981). Evolution <strong>of</strong> <strong>the</strong> Nervous<br />

System. New York: Oxford University Press.<br />

Thompson, R. F. (1990). Neural mechanisms <strong>of</strong> classical conditioning<br />

in mammals. Philosophical Transactions <strong>of</strong> <strong>the</strong> Royal<br />

Society <strong>of</strong> London Series B 329:171–178.<br />

Yeo, C. H., M. J. Hardiman, and M. Glickstein. (1985). Classical<br />

conditioning <strong>of</strong> <strong>the</strong> nictitating membrane response <strong>of</strong> <strong>the</strong> rabbit<br />

(3 papers). Experimental Brain Research 60: 87–98; 99–113;<br />

114–125.<br />

Fur<strong>the</strong>r Readings<br />

Chess, Psychology <strong>of</strong> 113<br />

Abeles, M. (1991). Corticonics: Neural Circuits <strong>of</strong> <strong>the</strong> Cerebral<br />

Cortex. Cambridge: Cambridge University Press.<br />

Creuzfeldt, O. D. (1983). Cortex cerebri: leistung, strukturelle und<br />

functionelle Organisation der Hirnrinde. Berlin: Springer-Verlag.<br />

Translated by Mary Creuzfeldt et al. as “Cortex cerebri:<br />

performance, structural and functional organisation <strong>of</strong> <strong>the</strong> cortex,”<br />

Gottingen 1993.<br />

Jones, E. G., and A. Peters. (1985). Cerebral Cortex. Five volumes.<br />

New York: Plenum Press.<br />

Martin, R. D. (1990). Primate Origins and Evolution. London:<br />

Chapman and Hall.<br />

Cerebral Specialization<br />

See HEMISPHERIC SPECIALIZATION<br />

Chess, Psychology <strong>of</strong><br />

Historically, chess has been one <strong>of</strong> <strong>the</strong> leading fields in <strong>the</strong><br />

study <strong>of</strong> EXPERTISE (see De Groot and Gobet 1996 and<br />

Holding 1985 for reviews). This popularity as a research<br />

domain is explained by <strong>the</strong> advantages that chess <strong>of</strong>fers for<br />

studying cognitive processes: (i) a well-defined task; (ii)<br />

<strong>the</strong> presence <strong>of</strong> a quantitative scale to rank chess players<br />

(Elo 1978); and (iii) cross-fertilization with research on<br />

game-playing in computer science and artificial intelligence.<br />

Many <strong>of</strong> <strong>the</strong> key chess concepts and mechanisms to be<br />

later developed in cognitive psychology were anticipated by<br />

Adriaan De Groot’s book Thought and Choice in Chess<br />

(1946/1978). De Groot stressed <strong>the</strong> role <strong>of</strong> selective search,<br />

perception, and knowledge in expert chess playing. He also<br />

perfected two techniques that were to be <strong>of</strong>ten used in later<br />

research: recall <strong>of</strong> briefly presented material from <strong>the</strong><br />

domain <strong>of</strong> expertise, and use <strong>of</strong> thinking-aloud protocols to<br />

study problem-solving behavior. His key empirical findings<br />

were that (i) world-class chess grandmasters do not search<br />

more, in number <strong>of</strong> positions considered and in depth <strong>of</strong><br />

search, than weaker (but still expert) players; and (ii) grandmasters<br />

and masters can recall and replace positions (about<br />

two dozen pieces) presented for a few seconds almost perfectly,<br />

while weaker players can replace only a half dozen<br />

pieces.<br />

De Groot’s <strong>the</strong>oretical ideas, based on Otto Selz’s psychology,<br />

were not as influential as his empirical techniques<br />

and results. It was only about twenty-five years later that<br />

chess research would produce a <strong>the</strong>ory with a strong impact<br />

on <strong>the</strong> study <strong>of</strong> expertise and <strong>of</strong> cognitive psychology in<br />

general. In <strong>the</strong>ir chunking <strong>the</strong>ory, Simon and Chase (1973)<br />

stressed <strong>the</strong> role <strong>of</strong> perception in skilled behavior, as did De<br />

Groot, but <strong>the</strong>y added a set <strong>of</strong> elegant mechanisms. Their<br />

key idea was that expertise in chess requires acquiring a<br />

large collection <strong>of</strong> relatively small chunks (each at most six<br />

pieces) denoting typical patterns <strong>of</strong> pieces on <strong>the</strong> chess<br />

board. These chunks are accessed through a discrimination<br />

net and act as <strong>the</strong> conditions <strong>of</strong> a PRODUCTION SYSTEM: <strong>the</strong>y<br />

evoke possible moves in this situation. In o<strong>the</strong>r respects,<br />

chess experts do not differ from less expert players: <strong>the</strong>y

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