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2006
- handle: 10670/1.u23gav
- 0214-9915
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Psicothema
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Manuel Juan Espinosa et al., « The differentiation hypothesis and the Flynn effect », Psicothema, ID : 10670/1.u23gav
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"Many studies have shown that IQs have been increasing over the last half century. These increases havecome to be known as «the Flynn effect». The «Flynn effect» represents a difference on ability-levelbetween groups of the same age but different cohort. The ability-level differentiation hypothesis representsa difference on the relevance of cognitive factors between groups of high and low ability.Hence, it should be possible to imitate the ability-level differentiation effect by comparing groups ofthe same age but different cohort. The indifferentiation hypothesis represents no differences on the relevanceof cognitive abilities in all age groups within the same cohort. The aim of the present study isto test the relationships between these phenomena. For this purpose we analyzed the American standardisationsamples of the WISC, WISC-R and WISC-III. Results support the link between the Flynneffect and the differentiation hypothesis. Also, reported evidence replicate previous findings supportingthe indifferentiation hypothesis. Implications for the assessment of the intelligence are discussed."