Can I give all the core and supplemental subtests and choose to use the highest subtest scaled scores when computing composite scores?
No. When deriving composite scores, you can only substitute supplemental subtests substituted for core subtests that are spoiled or invalidated. Supplemental subtests are also used to provide additional information on cognitive functioning. However, you should decide before you administer the subtests which one to use to derive composite scores. If you need to use a supplemental subtest in place of a core subtest for clinical reasons, decide this before you administer the subtest—not after you have derived scaled scores. For example, an individual with motor impairment may be administered Figure Weights as a substitute for Block Design. Supplemental subtests are also useful when the scores within an index are widely discrepant. The additional information from the supplemental subtest can help tease out factors contributing to disparate results.
Related Questions
- When calculating composite scores based on less than the total number of subtests typically used for that composite, how does one find the SEm for the composite?
- How can standard scores be generated for raw scores of 0 on the WIAT-IIUK subtests? How does this affect the Composite score?
- Who has the highest scores on each game?
