Thurstone Word Fluency Test

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Thurstone Word Fluency Test
Medical diagnostics
Synonyms Chicago Word Fluency Test
Purposemeasure an individual's symbolic verbal fluency

The Thurstone Word Fluency Test, also known as the Chicago Word Fluency Test (CWFT), [1] was developed by Louis Thurstone in 1938. [2] This test became the first word fluency psychometrically measured test available to patients with brain damage. [3] The test is a used to measure an individual's symbolic verbal fluency. [4] [5] [6] The test asks the subject to write as many words as possible beginning with the letter 'S' within a 5-minute limit, then as many words as possible beginning with letter 'C' within 4 minute limit. The total number of 'S' and 'C' words produced, minus the number of rule-breaking and perseverative responses, yield the patients' measure of verbal fluency.


The CWFT is used as one of the measures of brain's frontal lobe function. A related test, the COWAT (Controlled oral word association test), is part of the Halstead-Reitan Neuropsychological Battery.

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  1. Kolb, Bryan, and Ian Q. Whishaw (2008). Fundamentals of Human Neuropsychology. New York: Worth. p. 443. ISBN   978-0-7167-9586-5.CS1 maint: uses authors parameter (link)
  2. Thurstone, LL and Thurstone, TG (1938). Primary Mental Abilities. Chicago: Univ. of Chicago Press. OCLC   741860993.CS1 maint: uses authors parameter (link)
  3. Spreen, O., & Risser, A. (2003). Assessment of aphasia. Oxford: Oxford University Press.CS1 maint: uses authors parameter (link)
  4. Pendleton, Mark G.; et al. (Dec 1982). "Diagnostic utility of the thurstone word fluency test in neuropsychological evaluations". Journal of Clinical Neuropsychology . 4 (4): 307–317. doi:10.1080/01688638208401139. PMID   7174838.
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