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Comparative Study
. 1992 May;48(3):360-3.
doi: 10.1002/1097-4679(199205)48:3<360::aid-jclp2270480314>3.0.co;2-p.

The relationship between intellectual ability and adult performance on the Trail Making Test and the Symbol Digit Modalities Test

B W Waldmann  1 , A L Dickson, M C Monahan, R Kazelskis
Affiliations
Comparative Study

The relationship between intellectual ability and adult performance on the Trail Making Test and the Symbol Digit Modalities Test

B W Waldmann et al. J Clin Psychol. 1992 May.

Abstract

Subjects between the ages of 18 and 30 were divided in groups based on their Satz-Mogel Wechsler Adult Intelligence Scale-Revised Full Scale IQs: (a) Borderline (70 to 79); (b) Low Average (80 to 89); (c) Average (90 to 109); (d) High Average (110 to 119); (e) Superior (120 to 129). Each subject was administered the Trail Making Test (Forms A and B) and the written version of the Symbol Digit Modalities Test. A significant effect for IQ emerged. The low ability subjects were, in the main, significantly different from the higher ability subjects. No gender differences were found.

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