The Stroop color-word test: influence of age, sex, and education; and normative data for a large sample across the adult age range.
The Stroop Color-Word Test was administered to 1,856 cognitively screened, healthy Dutch speaking participants aged 24 to 81 years. The effects of age, gender, and education on Stroop test performance were investigated to adequately stratify the normative data. The results showed that especially the speed-dependent Stroop scores (time to complete a subtest), rather than the accuracy measures (the errors made per Stroop sub-task), were profoundly affected by the demographic variables. In addition to the main effects of the demographic variables, an Age Low Level of Education interaction was found for the Error III and the Stroop Interference scores. This suggests that executive function, as measured by the Stroop test, declines with age and that the decline is more pronounced in people with a low level of education. This is consistent with the reserve hypothesis of brain aging (i.e., that education generates reserve capacity against the damaging effects of aging on brain functions). Normative Stroop data were established using both a regression-based and traditional approach, and the appropriateness of both methods for generating normative data is discussed.
Van der Elst
Wim
W
Department of Psychiatry and Neuropsychology, Maastricht University, Maastricht, The Netherlands.
Van Boxtel
Martin P J
MP
Van Breukelen
Gerard J P
GJ
Jolles
Jelle
J
D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003071:Cognition; D003118:Color Perception; D004522:Educational Status; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D012016:Reference Values; D015203:Reproducibility of Results; D012737:Sex Factors; D014825:Vocabulary