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Neuroimaging correlates of parent ratings of working memory in typically developing children

Published online by Cambridge University Press:  01 January 2009

E. MARK MAHONE*
Affiliation:
Department of Neuropsychology, Kennedy Krieger Institute, Baltimore, Maryland Department of Psychiatry and Behavior Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland
REBECCA MARTIN
Affiliation:
Department of Neuropsychology, Kennedy Krieger Institute, Baltimore, Maryland
WENDY R. KATES
Affiliation:
Department of Psychiatry and Behavior Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland Department of Psychiatry, SUNY Upstate Medical University, Syracuse, New York
TRISHA HAY
Affiliation:
Department of Psychology, University of Kansas, Lawrence, Kansas
ALENA HORSKÁ
Affiliation:
Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland
*
*Correspondence and reprint requests to: E. Mark Mahone, Department of Neuropsychology, Kennedy Krieger Institute, 1750 East Fairmount Avenue, Baltimore, MD 21231. E-mail: [email protected]

Abstract

The purpose of the present study was to investigate construct validity of parent ratings of working memory in children, using a multi-trait/multi-method design including neuroimaging, rating scales, and performance-based measures. Thirty-five typically developing children completed performance-based tests of working memory and nonexecutive function (EF) skills, received volumetric MRI, and were rated by parents on both EF-specific and broad behavior rating scales. After controlling for total cerebral volume and age, parent ratings of working memory were significantly correlated with frontal gray, but not temporal, parietal, or occipital gray, or any lobar white matter volumes. Performance-based measures of working memory were also moderately correlated with frontal lobe gray matter volume; however, non-EF parent ratings and non-EF performance-based measures were not correlated with frontal lobe volumes. Results provide preliminary support for the convergent and discriminant validity of parent ratings of working memory, and emphasize their utility in exploring brain–behavior relationships in children. Rating scales that directly examine EF skills may potentially have ecological validity, not only for “everyday” function, but also as correlates of brain volume. (JINS, 2009, 15, 31–41.)

Type
Research Articles
Copyright
Copyright © INS 2009

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