Abstract
To explore the unique and unitary of CEF, three CEFs (random generation, selective attention, and memory updating) were considered. Subjects were 31 young adults and 31 old adults. Each subject attended 6 tasks of 2 difficult levels of 3 CEFs and RAVENS test. The results showed that (1) age effect was significant on random generation and memory updating (MU). However, there was no age effect on selective attention. (2) The age effect was significant on MU even if age deficits in FI were controlled. (3) Although different levels had similar age effect (a strong all-or-none effect) within each CEF, different CEFs did not. (4) After FI was statistically controlled, the correlation between different CEF tasks was not significant, but the correlation between different levels within each CEF was still significant. These results suggested that the deficit in CEF should be unique, and at least partially independent of age differences in general FI (referring to result 2, 4); moreover, CEF should not be a unitary system but include separable functions (referring to result 1, 3).
| Keywords: | working memory; central executive function; fluid intelligence; age difference |
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