Lecture 7

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25 Jan 2011
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Psychology Lecture 7
Spearman
-intelligence consists of general and specific factors
Analytical approach
-some factor of intelligence relate to each other
Stanford-Binet Intelligence Test
-consists of 4 important components:
1) Verbal reasoning- ability to understand vocabulary
2) Quantitative reasoning- number sense
3) Abstract visual reasoning- paper-folding, copying
4) Short-term working memory- memory for sentence and digit
Thurstone
-used factor analytic approach to study intelligence
-found 7 factors:
1) Verbal comprehension
2) Verbal fluency
3) Number
4) Spatial visualization- rotation of object in mind
5) Memory- short-term working memory
6) Reasoning
7) Perceptual speed- how fast one understands information
Cattell
-also used factor analysis (data reduction procedure)
-many tasks eventually cluster and belong to one skill
-reduced the seven factors further into two factors
1) Fluid intelligence
-tasks like rotation of object visually and fast problem solving skill
-speed capacity, ability to see relationship between number and shape, math
-skill decreases as age increases
2) Crystallized intelligence
-accumulation of knowledge based on experience
-vocabulary
-skills do not lose with age
Factor Analysis
-the more you reduce, the more general and fundamental the factors become
-lose detail and focus
-statistical choice to reduce data
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