Age Differences in Fluid Intelligence: Contributions of General Slowing and Frontal Decline

Autor/inn/en	Bugg, Julie M.; Zook, Nancy A.; DeLosh, Edward L.; Davalos, Deana B.; Davis, Hasker P.
Titel	Age Differences in Fluid Intelligence: Contributions of General Slowing and Frontal Decline
Quelle	In: Brain and Cognition, 62 (2006) 1, S.9-16 (8 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0278-2626
DOI	10.1016/j.bandc.2006.02.006
Schlagwörter	Reaction Time; Age Differences; Intelligence; Task Analysis; Cognitive Processes; Cognitive Ability; Aging (Individuals); Measures (Individuals); Brain + Suchen Sie Ihr Suchwort? Reaktionsvermögen; Age; Difference; Age difference; Altersunterschied; Intelligenz; Klugheit; Aufgabenanalyse; Cognitive process; Kognitiver Prozess; Denkfähigkeit; Aging; Altern; Messdaten; Gehirn
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. (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10