The Wechsler Intelligence Scale Third Edition (WAIS-III) is an individually administered intelligence test for adults and older adolescents. It was created by David Wechsler to address some limitations of Alfred Binet's original intelligence test, including that Binet's test was focused more on language and verbal skills, used mental age norms that did not apply to adults, and its emphasis on speed handicapped older adults. The WAIS-III addresses these issues through improved content, stimulus materials, and de-emphasis on speed. It provides Verbal, Performance, and Full Scale IQ scores as well as index scores in Verbal Comprehension, Perceptual Organization, Working Memory, and Processing Speed. The WAIS-III

1. Wechsler Intelligence Scale Third Edition “ The global capacity to act purposefully, to think rationally, and to deal effectively with one's environment”

14. Structure of WAIS III FSIQ - Digit Span - Arithmetic - Letter–Number Sequencing - Vocabulary - Similarities - Information - Comprehension - Digit Symbol— Coding - Symbol Search - Block Design - Matrix Reasoning - Picture Completion - Picture Arrangement VIQ PIQ VCI WMI POI PSI

49. SUBTESTS Raw Score VERBAL PERF. VC PO WM PS Reference Group Scaled Scores Age-Adjusted Scaled Scores Picture Completion 22 12 12 12 Vocabulary 56 13 13 15 Digit-Symbol Coding 54 7 7 6 Similarities 28 12 12 13 Block Design 41 11 11 10 Arithmetic 11 8 8 9 Matrix Reasoning 20 13 13 12

50. IQ/Index Scores VIQ PIQ FSIQ Sums of Scaled Scores 62 55 117 IQ/Index Scores 101 106 103 Percentiles 53 66 58 Confidence Intervals 95% 96-106 99-112 99-107

51. 13 9.57 3.43 2.10 5 <5% 12 9.57 2.43 2.77 8 9.57 –1.57 2.63 7 9.57 –2.57 2.40 W >25% 1 1 9.57 1.43 2.34 1 1 9.57 1.43 2.96 SUBTESTS Scaled Score Vocabulary Similarities Arithmetic Digit Span Information Mean Score Difference from Mean Statistical Significance .05 Level Strength (+) Weakness (–) Frequency of Difference in Standardization Sample Total ÷ No. of Subtests Mean Score 67 70 = 137 7 7 ÷ 14 9.57 10 9.79 Overall Mean Comprehension

52. 101 106 -5 8.48 110 111 -1 9.78 110 80 30 9.08 2.3% 111 79 32 12.13 2.6% DISCREPANCY COMPARISONS Verbal IQ – Performance IQ Verbal Comprehension – Perceptual Organization Verbal Comprehension – Working Memory Perceptual Organization – Processing Speed Score 1 Score 2 Difference Statistical Significance .05 Level Frequency of Difference in Standardization Sample VIQ PIQ VCI POI VCI WMI POI PSI Digits Forward – Backward 7 5 2 60% FWD BKWD