Psychometric Equivalence of the Computerized and Original Halstead Category Test Using a Matched Archival Sample

Area of Science:

• Neuropsychology and Psychometric Assessment
• Cognitive Function Evaluation

Background:

• The Halstead Category Test (HCT) is a widely used neuropsychological tool.
• Transitioning to computer-based versions requires validation to ensure psychometric equivalence.
• Understanding the equivalence between the original HCT-OV and HCT-CV is crucial for consistent clinical application.

Purpose of the Study:

• To investigate the psychometric equivalence between the traditional Halstead Category Test (HCT-Original Version [OV]) and its computer-based counterpart (HCT-Computerized Version [CV]).
• To examine structural equivalence, score and variability equivalency, reliability, and differential functioning of items and the test between the two HCT versions.

Main Methods:

• Confirmatory factor analysis was employed to assess structural equivalence.
• Rasch modeling was utilized to examine differential item and test functioning.
• Data from 211 adults, matched on key demographic and cognitive variables, were analyzed.

Main Results:

• The factor structure of the HCT-OV adequately fit the HCT-CV scores.
• Reliability estimates were high and similar for both versions (0.96 for HCT-OV, 0.97 for HCT-CV).
• Negligible differences (<1%) in expected total scores were found between the HCT-CV and HCT-OV, despite some differential item functioning.

Conclusions:

• The HCT-Computerized Version (HCT-CV) functions similarly to the HCT-Original Version (HCT-OV).
• The HCT-CV demonstrates good psychometric properties, including reliability and construct validity.
• Further research is recommended to generalize findings and explore validity evidence equivalency.