WAIS-IV Flashcards
WAIS-IV age range?
16 - 90
WAIS-IV Descriptors by Score
130+ Very Superior
120-29 Superior
110-119 High Average
90-109 Average
80-89 Low Average
70-79 Borderline
<69 Extremely Low
Two steps to determining whether FSIQ, GAI, or neither is appropriate on a WAIS-IV report?
Step 1: Subtract the lowest index score from the highest. If the difference is >23 points (1.5 SD) don’t use FSIQ.
Step 2: Is the difference between VCI and PRI less than >23 points (1.5 SD)? If so, calculate and use GAI.
Otherwise, neither measure is appropriate.
What is a unitary ability on the WAIS-IV?
A difference of less than 5 scaled score points (1.5 SD) between the highest and lowest subtest scores indicates a unitary ability and thus an interpretable index.
Which 3 WAIS-IV subtests cannot be administered to adults over 70 y.o.?
Letter-number Sequencing;
Figure Weights;
Cancellation
When is it inappropriate to compare strengths and weaknesses when scoring the WAIS-IV?
If there is a significant difference between VCI and PRI
What are the rules for substitution and proration of scores on the WAIS-IV?
- One supplementary test per index score can be substituted
- No more than two total substitutions for FSIQ/GAI calculation
- Prorated sum of two core subtest scaled scores can be used to calculate VCI/PRI but not WMI/PSI
Mean, range, and SD for WAIS-IV scaled scores
Mean 10
SD 3
Range 1-19
What WAIS-IV subtest on the PRI is sensitive to the impact of TBI in terms of visual-perceptual issues?
Block Design
What WAIS-IV subtests on the PRI involve cognitive flexibility?
Matrix Reasoning, Visual Puzzles, Figure Weights
What WAIS-IV subtests on the WMI and PSI involve attention span?
Letter-Number Sequencing, Cancellation, Arithmetic, Digit Span
WAIS-IV IQ ranges for Intellectual Disability
50-55 to 69 Mild
35-40 to 50-55 Moderate
20-25 to 35-40 Severe
Below 20-25 Profound
What WAIS-IV subtest/ability is the best indicator of premorbid functioning?
Vocabulary
