The Weigl Colour-Form Sorting Test: a quick and easily administered bedside screen for dementia and executive...

Area of Science:

• Neuroscience
• Psychology
• Gerontology

Background:

• Cognitive impairment screening requires valid, reliable, and easily administered instruments.
• The Weigl's Colour-Form Sorting Test (WCFT) is a non-verbal cognitive screening tool.
• Its utility in community-based samples of stroke survivors, Parkinson's disease (PD) patients, and controls was investigated.

Purpose of the Study:

• To determine the utility of the WCFT as a brief cognitive screen.
• To assess the WCFT's sensitivity and specificity in detecting cognitive impairment.

Main Methods:

• 236 subjects participated: 105 stroke survivors, 40 PD patients, and 91 controls.
• Sensitivity and specificity were determined using psychiatric interviews, cognitive assessments, and DSM-IV criteria.
• The WCFT's optimal cut-point was identified.

Main Results:

• The optimal WCFT cut-point for cognitive impairment was 2/4 across all groups.
• Sensitivity ranged from 77.8% (stroke) to 83.3% (controls).
• Specificity ranged from 78.3% (stroke) to 94.1% (controls), with diagnostic accuracy (AUC > 0.70) indicating good psychometric properties.

Conclusions:

• The WCFT demonstrated good sensitivity and specificity for detecting cognitive impairments.
• Its language-independent nature and psychometric properties make it a useful addition to existing cognitive screening methods.
• The WCFT is a valuable adjunct for clinical practice in assessing cognitive function.