(See Rapid Reference 5.2 for descriptive categories.) For subtests, report scaled scores and percentile ranks only. Report the Person’s WAIS-IV Standard Scores (FSIQ and Indexes) and Subtest Scaled Scores.įor IQ and indexes, report standard score, confidence interval, percentile rank, and descriptive category. If NO, then proceed to Step 3.Īppendix A A.1: WAIS‐IV Interpretive Worksheet 1 If YES, the GAI can be calculated and interpreted as a reliable and valid estimate of the person’s overall intellectual ability. Sum of Subtest Scaled Scores VC SI IN MR BD VP GAI Scaled Score + + + + + = If YES, the FSIQ may be interpreted as a reliable and valid estimate of a person’s overall intellectual ability. VCI PRI Absolute Difference Is the difference < 23 points? Index Standard Scores: – = Y or N To calculate the GAI, sum 6 subtest scaled scores of the 3 VCI subtests and 3 PRI subtests, and locate the GAI that corresponds to this sum in Table C.1 of the WAIS-IV Technical and Interpretive Manual (Psychological Corporation, 2008, p. To determine whether the General Ability Index (GAI) may be used to summarize overall intellectual ability, calculate the difference between the VCI and PRI. Highest Lowest Difference Is the difference < 23 points? Index Standard Scores: – = Y or N Step 2b. To determine whether the FSIQ is interpretable, subtract the Lowest Index from the Highest Index. Determine the Best Way to Summarize Overall Intellectual Ability. (See Rapid Reference 5.2 for descriptive categories.) STEP 2. For IQ and indexes, report standard score, confidence interval, percentile rank, and descriptive category. Report the Person’s WAIS-IV Standard Scores (FSIQ and Indexes) and Subtest Scaled Scores. Appendix A A.1: WAIS ‐ IV Interpretive Worksheet 1 STEP 1.
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