Intelligence: Concept & Theories
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Upon conducting a deep comparative and factor analysis of Charles Spearman's 'Two-Factor Theory of Intelligence' and Louis Thurstone's 'Primary Mental Abilities Theory', if Spearman's model of 'g-factor' (general factor) and 's-factor' (specific factor) and Thurstone's approach of 7 independent primary components (such as verbal comprehension, spatial ability, numerical ability, etc.) explain intellectual structure, which of the following is the most fundamental and scientific difference between these two theories?
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Detailed Explanation
Charles Spearman proposed the 'Two-Factor Theory' in 1904 using the statistical technique of 'Factor Analysis', according to which intelligence consists of two factors: the general factor (g-factor), which is used equally in all types of mental activities, and the specific factor (s-factor), which provides efficiency in a particular field. In contrast, L.L. Thurstone rejected Spearman's 'g' factor model, presented a multi-factor approach, and recognized that intelligence is a group of several independent Primary Mental Abilities.
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