Cattell, R. B. (). Theory of fluid and crystallized intelligence: A critical experiment. Journal of Educational Psychology, 54(1), /. Crystallized Intelligence: Examples & Definition . These two tasks illustrate two different types of intelligence proposed by Raymond Cattell known as ‘fluid Psychology has offered many theories about intelligence over the. Charles Spearman’s noted student Raymond Cattell expanded on Spearman’s theory of a unified g and explored the difference between two independent but.

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Intelligence by type Creativity Intelligence. Higher level difficulty in verbal test material [Abstract].

Their scores were found to have increased significantly. Their structure, growth, and action. But with disease or brain injury, there may be a dissociation of abilities. Concept Formation tasks assess inductive reasoning ability. It increases until adolescence and then slowly declines. The effect of early and late brain injury upon test scores, and the nature of normal adult intelligence.

Hebb sent the typed version of his APA talk to Cattell. The author declares that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. Crystallized intelligence is possibly more amenable to change as it relies on specific, acquired knowledge.

Hebb’s paper was an important step in the development of his ideas tneory intelligence and brain function. Cattell’s work on intelligence testing Cattell a gave a detailed critique of the Binet test and was concerned that differences in scores on intelligence tests were due to differences in social status, special abilities distinct from intelligence, or other environmental factors.

Crystallized intelligence is indicated by a person’s depth and breadth of general knowledge, vocabulary, and the ability to reason using words fluie numbers.


Cattell, September 24, 1.

Fluid and Crystallized Intelligence

Cattell to Hebb, September 22, 1. The Abilities of Man: Lyndsay T Wilson Dec 6, What happened after ?

At the APA meeting, Cattell discussed his ideas on the differences between measuring intelligence in children and adults and how differences in intelligence quotients might depend on the nature of the tests given. Later, Hebb’s students made improvements to the Hebb-Williams maze as a test of intelligence for the rat Rabinovitch and Rosvold,and used this test to examine the effects of environmental enrichment on problem solving in rats Forgays and Forgays, ; Hymovitch, The individual has to determine the missing colors within each of the puzzles using the key.

A method of rating animal intelligence.

After student subjects were given a day training regimen based on the dual n-back working memory theory, the students were tested on Raven’s Standard Progressive Matrices. This was the beginning of Hebb’s ideas of multiple memory systems. The Binet-Simon intelligence scale and its modifications such as the Stanford-Binet scale were the most commonly used tests of intelligence in the ‘s Pintner,but catgell Wechsler-Bellevue intelligence scale, published in Wechsler, introduced a number of innovations in intelligence testing including a test more suitable for measuring intelligence in adults rather than children; the inclusion of both verbal and performance measures of intelligence; and the omission of memory tests Boake, Inttelligence Gf is independent of crystallized knowledge, it can be directed to any activity and solve any problem.

Naturally Hebb and I in discussion gained clarifications, but this would have happened if I had discussed the same matter with any other man of Hebb’s intelligence and liking for the subject. Brown, September 15, Integration of structural and developmental concepts in the theory of fluid and crystallized intelligencein Handbook of Multivariate Experimental Psychologyed Cattell R.


Some theoretical issues in adult intelligence testing [Abstract]. It is thus clear that the ideas of fluid and crystallized intelligence were Hebb’s and were adapted by Cattell. Crystallized intelligence is one’s lifetime of intellectual achievement, as demonstrated largely through one’s vocabulary and general knowledge. Experimental control of cues determining the rat’s orientation [Abstract].

On page of this paper, Cattell discussed a third problem in developing adult intelligence tests; the problem of an mental capacities following brain injury, a topic that he had never mentioned in his previous papers on intelligence.

Hebb presented these subjects with a battery of commonly used psychological tests in order to ascertain the extent to which removal of brain tissue in different locations led to impairments in specific cognitive functions. It is in essence the theory on which Hebb has been experimenting all the year. Cattell, September 23, 1. Hebb went on to say that: In this letter, Hebb was quite blunt.

Fluid and Crystallized Intelligence.

Fluid and Crystallized Intelligence

Part of what we mean by intelligence in an adult, therefore, may consist of a store of solutions, so to speak, for common problems—points of view, methods of approach, ways of seeing things. This whole business distresses me, and I wish you would write to let me know at once intelliggence you think this [is] claiming too much. Cattell’s presentation at the APA Meeting was a factor analysis of the concept of socioeconomic social status Cattell, b.

Hebb papers MG in Montreal, Quebec.