Development of Incidental Recall and Direct Copy Procedures for the Coding Subtest of the Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV)
Brown, Kristina I.
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The present investigation provides normative data for the new Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV; Wechsler 2008) Pairing, Free Recall, and Direct Copy procedures. It also examines 30-second interval patterns on the WAIS-IV Coding subtest and the new Direct Copy task. Participants were 163 healthy college students, 60 were males and 103 females. Means for age and education were 25.78 years (SD=11.28, Range = 18 to 69) and 13.76 years (SD=1.83, Range = 8 to19), respectively. One hundred thirty-seven participants were Caucasian, 15 African American, 5 Asian American, and 4 Hispanic. Females were expected to perform better than males on the Coding subtest on both raw scores and scaled scores and on the Direct Copy task raw score. Regardless of sex, participants were predicted to recall 12 to 18 number-symbol pairs on the first Pairing component and 7 to 8 number-symbol pairs on the second component of the Pairing task, and 7 to 9 symbols on the Free Recall component. Males were predicted to recall more number-symbol pairs and individual symbols that females on the Pairing and Free Recall tasks. A warm-up pattern was predicted on the Coding subtest and Direct Copy task across 30-second transcription intervals. Results indicated that females scored significantly better than males on the Coding scaled score but not on the raw score. The performance of males and females did not differ on the Direct Copy task. Participants did not recall the average number-symbol pairs on Pairing and there was no difference in performance between sexes. Participants recalled the predicted average number of individual symbols on the Free Recall task, but there was no difference in performance between sexes. An ANOVA revealed no significant difference in performance patterns across 30-second intervals or between sexes on the WAIS-IV Coding subtest. Conversely, a one-way repeated measures ANOVA on the 30-second interval patterns on the new Direct Copy task revealed that males and females differed in level and pattern of performance across the 30-second intervals.