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This study establishes excellent interrater reliability for the Wisconsin Card Sorting Test (WCST) scoring criteria, even with novice raters. Supplemental instructions improved training efficiency without compromising accuracy in neuropsychological assessments.

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Area of Science:

  • Neuropsychology
  • Psychometrics

Background:

  • Neuropsychological instruments are increasing, but their accuracy and standardization require further study.
  • The Wisconsin Card Sorting Test (WCST) is widely used, but its scoring criteria, particularly for perseveration, are complex and lack established interrater reliability.

Purpose of the Study:

  • To examine the standard scoring criteria of the WCST.
  • To establish interrater reliability for WCST scoring.
  • To assess the impact of supplemental scoring instructions on training time and reliability.

Main Methods:

  • Study 1: Assessed interrater reliability among three experienced WCST scorers.
  • Study 2: Assessed interrater agreement among six novice scorers, some using supplemental instructions.
  • Utilized generalizability theory to analyze reliability.

Main Results:

  • Excellent interrater reliability was found among experienced scorers.
  • Excellent interrater agreement was achieved among novice scorers.
  • Supplemental scoring instructions reduced training time by 41% without negatively impacting reliability.

Conclusions:

  • The WCST scoring criteria demonstrate high interrater reliability, even for novice users.
  • Supplemental scoring instructions enhance training efficiency for the WCST.
  • Generalizability theory is a valuable tool for assessing the reliability of neuropsychological instruments.