On the reliability, validity, and cognitive structure of the Thurstone Word Fluency Test

Area of Science:

• Neuropsychology
• Cognitive Psychology

Background:

• The Thurstone Word Fluency Test (TWFT) is a common neuropsychological tool.
• Limited data exists on its psychometric properties.

Purpose of the Study:

• To evaluate the psychometric properties of the TWFT.
• To assess its reliability, validity, and cognitive underpinnings.

Main Methods:

• The study analyzed the test-retest and inter-rater reliability of the TWFT.
• Construct and criterion validity were examined.
• Cognitive abilities contributing to TWFT performance were investigated.

Main Results:

• The TWFT demonstrated excellent test-retest and inter-rater reliability.
• Good construct validity was found, but criterion validity was limited by poor specificity and sensitivity.
• Performance on the TWFT relies on attention, psychomotor speed, and memory.

Conclusions:

• The TWFT is a reliable measure of cognitive function.
• It is useful for detecting, but not localizing, cerebral dysfunction.
• The TWFT should supplement, not replace, comprehensive neuropsychological assessments.