Analysis of Individual Variability among Older Adults on the Stroop Color Word Interference Test

Abstract

The present study examines systematic variation in the pattern of response to the Stroop test among a sample of older adults (N = 41), as well as the extent to which various configural patterns of response are related to other individual difference factors. Pattern analysis identified four reasonably prototypic patterns of performance. Three significant discriminant functions, capable of differentiating the four response patterns, were significantly and uniquely related to age, level of cautiousness, and verbal intelligence, respectively. The analyses suggest that performance on the Stroop test is multidimensional with significant variation among older adults, and that different components of performance are differentially related to unique individual difference variables. The findings reinforce the importance of recognizing and understanding the nature of individual variation among elderly individuals in aging research.

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References

Cerella

, Information Processing Rates in the Elderly, Psychological Bulletin, 98, pp. 67–83, 1985.

Krauss

I. K.

, Between- and Within-Group Comparisons in Aging Research, in Aging in the 1980's: Psychological Issues, Poon

L. W.

(ed.), American Psychological Association, Washington, D.C., pp. 542–551, 1980.

Burke

D. M.

and Light

L. L.

, Memory and Aging: The Role of Retrieval Processes, Psychological Bulletin, 90, pp. 513–546, 1981.

Stroop

J. R.

, Studies of Interference in Serial Verbal Reactions, Journal of Experimental Psychology, 18, pp. 643–661, 1935.

Comalli

P. E.

Wapner

, and Werner

, Interference of Stroop-Color-Word Test in Childhood, Adulthood, and Aging, The Journal of Genetic Psychology, 100, pp. 47–53, 1962.

Dyer

F. W.

, The Stroop Phenomenon and Its Use in the Study of Perceptual, Cognitive, and Response Processes, Memory and Cognition, 1, pp. 106–120, 1973.

Panek

P. E.

and Rush

M. C.

, Cautiousness and Visual Selective Attention Performance of Older Adults, paper presented at the 93rd Annual Convention of the American Psychological Association, Los Angeles, August 1985.

Panek

P. E.

Rush

M. C.

, and Slade

L. A.

, Locus of the Age-Stroop Interference Relationship, The Journal of Genetic Psychology, 145, pp. 209–216, 1984.

Jenson

A. R.

and Rohwer

W. D.

Jr. , The Stroop Color-Word Test: A Review, Acta Psychologia, 25, pp. 36–93, 1966.

10.

Kausler

D. H.

, Retention-Forgetting as a Nomological Network for Developmental Research, in Life-Span Developmental Psychology: Research and Theory, Goulet

L. R.

and Baltes

P. B.

(eds.), Academic Press, New York, pp. 305–353, 1970.

11.

Hoyer

W. J.

, Aging and Intraindividual Change, Developmental Psychology, 10, pp. 821–826, 1974.

12.

Maddox

G. L.

and Douglass

E. B.

, Aging and Individual Differences: A Longitudinal Analysis of Social, Psychological, and Physiological Indicators, Journal of Gerontology, 29, pp. 555–563, 1974.

13.

Sheppard

H. L.

(with assistance of Passarell

and Romashko

), Research and Development Strategy on Employment-Related Problems of Older Workers, American Institutes for Research Center on Work and Aging, Washington, D.C., 1977.

14.

Ammons

R. B.

and Ammons

C. H.

, The Quick Test, Psychological Test Specialists, Missoula, Michigan, 1962.

15.

Wagner

E. E.

, The Hand Test: Manual for Administration, Scoring and Interpretation, Western Psychological Services, Los Angeles, 1962.

16.

Overall

J. E.

and Klett

C. J.

, Applied Multivariate Analysis, McGraw-Hill, New York, 1972.

17.

Borgen

F. H.

and Seling

M. J.

, Uses of Discriminant Analysis Following MANOVA: Multivariate Statistics for Multivariate Purposes, Journal of Applied Psychology, 63, pp. 689–697, 1978.