Hebb then applied his ideas on both aspects of intelligence to animal experimentation. He published his method of evaluating animal intelligence, the Hebb-Williams labyrinth, which had been developed at Queen`s University in 1941 (Hebb and Williams, 1946) and used this labyrinth to test rats raised in an enriched domestic environment compared to rats raised in laboratory cages (Hebb, 1947, 1949). This experiment showed that intelligence measurements could be significantly altered by environmental experience, and was the first experimental evidence that intelligence A and B could be dissociated. Later, Hebb`s students improved the Hebb-Williams maze as an intelligence test for rats (Rabinovitch and Rosvold, 1951) and used this test to study the effects of environmental enrichment on problem solving in rats (Forgays and Forgays, 1952; Hymovitch, 1952). Hebb`s students also showed that there was an interaction between brain damage and the environmental experiment on intelligence in rats (Lansdell, 1953; Smith, 1959), which points out that the physiological and ecological aspects of intelligence could be dissociated. Later, Hebb`s students began to study the effects of environmental enrichment and deprivation on the measurement of intelligence in dogs (Thompson and Heron, 1954). Fluids and crystallized intelligence are constructions originally designed by Raymond Cattell. [1] The concepts of liquid and crystallized intelligence were developed by Cattell and his former student John L. Horn further developed. [5] [6] [2] Although fluid and crystallized intelligence represents two different groups of abilities, they can and often work together. For example, when cooking a meal, use crystallized intelligence to understand and follow the instructions in a recipe, and use liquid intelligence when adjusting spices and other ingredients to your tastes or nutritional needs.

Similarly, in a math test, formulas and mathematical knowledge (such as the meaning of a plus sign) come from crystallized intelligence. The ability to develop a strategy to solve a complicated problem, on the other hand, is the product of fluid intelligence. Thus, liquid intelligence and crystallized intelligence are intimately linked. Crystallized intelligence is formed by the investment of fluid intelligence when information is learned. By using fluid intelligence to think and reflect on problems, the information can then be transferred to long-term memory so that it can become part of crystallized intelligence. Fluid intelligence refers to the ability to argue, analyze, and solve problems. When we use fluid intelligence, we don`t rely on pre-existing knowledge. Instead, we use logic, pattern recognition, and abstract thinking to solve new problems. When you think of intelligence, what kind of things come to mind? Intelligence is more than just an accumulation of facts. This also includes the ability to learn new things. Psychologists have different definitions that they use to identify the different ways in which we obtain and use information.

Wie Horn (1966, p. 1). 554), Cattell did not conduct follow-up research on the theory of fluid and crystallized intelligence, but «left it on the shelf until 1963,» when he showed that two general skill factors could be derived from factoring culturally integrated and culturally appropriate intelligence test results from a sample of 277 grade and 8 children (Cattell, 1963). In this paper, he concluded that one of these factors «corresponds to the crystallized skill factor measured in traditional intelligence tests, and the other corresponds to a fluid general ability measured in culturally appropriate intelligence tests» (p. 20). John Horn, a student at Cattell, developed the theory of crystallized and fluid intelligence (Horn and Cattell, 1966, 1967). While crystallized intelligence improves or remains stable with age, liquid intelligence is known to decline quite rapidly after adolescence. Several studies have examined whether it is possible to improve fluid intelligence.

Horn[7] provided the following example of crystallized and fluid approaches to solving a problem. Here`s the problem he described: Fluid intelligence is the ability to think quickly and argue flexibly to solve new problems without relying on past experiences and accumulated knowledge. Examples of using fluid intelligence are solving puzzles and developing problem-solving strategies. Hebb, D. O., and Morton, N. W. (1944). Note on the measurement of adult intelligence. J. Gen.

Psychol. 30, 217–223. doi: 10.1080/00221309.1944.10544471 However, in his later writings, Cattell claimed that he developed his theory of liquid and crystallized intelligence independently of Hebb. Cattell (1984, p. 160), for example, notes that «[e.g.] Boring, either out of pride in Harvard (where I was teaching at the time) or his sense of history, wrote letters to clarify possible plagiarism. There was none: we had reached the same position independently, Hebb by physiology, I by factor analysis. Cattell`s pupil Horn (1966, p. 554) also felt that Cattell`s theory differed from Hebb`s. He explained: «On a purely theoretical and verbal level, the concepts here have some similarities with Hebb`s ideas about soft skills, which are simply called A and B. But unlike Hebb`s theory, in which capacity A is an unmeasured and non-measurable physiological potential (in behavioral terms), crystallized fluid theory specifies specific and different behavioral references for the two main concepts. The theory of fluid vs.

crystallized intelligence was first postulated by psychologist Raymond B. as a psychometrically sound theory.