Abstract：
:The current study examined the contributions of general slowing and frontal decline to age differences in fluid intelligence. Participants aged 20-89 years completed Block Design, Matrix Reasoning, simple reaction time, choice reaction time, Wisconsin Card Sorting, and Tower of London tasks. Age-related declines in fluid intelligence, speed of processing, and frontal function were observed. Hierarchical regression analyses showed that the processing speed and frontal function measures accounted for significant variance in fluid intelligence performance, but there was also a residual effect of age after controlling for each variable individually as well as both variables. An additional analysis showed that the variance in fluid intelligence that was attributable to processing speed was not fully shared with the variance attributable to frontal function. These findings suggest that the age-related decline in fluid intelligence is due to general slowing and frontal decline, as well as other unidentified factors.
journal_name
Brain Cognjournal_title
Brain and cognitionauthors
Bugg JM,Zook NA,DeLosh EL,Davalos DB,Davis HPdoi
10.1016/j.bandc.2006.02.006subject
Has Abstractpub_date
2006-10-01 00:00:00pages
9-16issue
1eissn
0278-2626issn
1090-2147pii
S0278-2626(06)00043-1journal_volume
62pub_type
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