Table 2: Discrepancy Analyses at the Index and Subtest Levels for Mr A’s WAIS-IV and WMS-IV Results.
Note. Ability level was used as the basis for comparison with the WAIS-IV results.
* Significant discrepancy p< .05. $Subtest scaled score was compared to the average scaled score for subtests within its respective cognitive domain.
Comparison Discrepancy Base Rate
WAIS-IV
Index Level Analysis
Perceptual Reasoning – Verbal Comprehension 19.0* 11.0
Perceptual Reasoning – Working Memory 33.0* 1.5
Perceptual Reasoning – Processing Speed 22.0* 19.0
Verbal Comprehension – Working Memory 14.0* 21.5
Verbal Comprehension – Processing Speed 3.0 -
Processing Speed – Working Memory 11.0 -
Subtest Level Analysis
Arithmetic – Digit Span 4.0* 9.4
Coding – Symbol Search 2.0 -
Mean Subtest Scaled Score – Block Design$ 1.7 -
Similarities – Mean Subtest Scaled Score$ 0.3 -
Mean Subtest Scaled Score – Digit Span 4.9* 1-2%
Matrix Reasoning – Mean Subtest Scaled Score$ 3.3* 5-10%
Mean Subtest Scaled Score – Vocabulary$ 2.7* 2-5%
Mean Subtest Scaled Score – Arithmetic 0.9 -
Mean Subtest Scaled Score – Symbol Search 1.9 -
Mean Subtest Scaled Score – Visual Puzzles$ 1.7 -
Information – Mean Subtest Scaled Score$ 2.3* 10-15%
Coding – Mean Subtest Scaled Score 0.1 -
Digit Span Forwards – Digit Span Backwards 2.0 -
Digit Span Sequencing – Digit Span Forwards 1.0 -
Digit Span Sequencing – Digit Span Backward 3.0 -
WMS-IV
Subtest Level Analysis
Symbol Span – Spatial Addition 2.0 -