Which part of the brain is responsible for verbal fluency?
Some previous neuroimaging and lesion studies have suggested that category fluency (semantic-based word retrieval) is mediated primarily by temporal cortex, while letter fluency (letter-based word retrieval) is mediated primarily by frontal cortex.
What is phonemic fluency?
Initial letter fluency, also referred to as the Controlled Oral Word Association Test (COWAT) (Benton; 1969) or phonemic fluency, requires the generation of words from initial letters (normally F, A, and S or C, F, and L) under time constraints (normally 60 seconds per letter, although 90 seconds is also used).
What affects verbal fluency?
In addition, age has been shown to impact verbal fluency performance. For instance, Bolla et al. (1990) found that age, verbal IQ, and gender were predictors of performance in verbal fluency tasks.
What does poor verbal fluency indicate?
Poor performance on verbal fluency tasks is a common sign in multiple neuropsychiatric conditions, including frontal lobe dysfunction, dementia, and depression (Lezak, 1995, p. 546).
How do you know if you are verbally fluent?
To score the VFT, count up the total number of animals or words that the individual is able to produce. 3 A score of under 17 indicates concern, although some practitioners use 14 as a cutoff. Typically, if someone scores less than 17, the test administrator will use additional tests to further evaluate cognition.
What is phonemic and semantic verbal fluency?
Phonemic fluency was defined as the sum of correct, non-repeated words that an individual produced in the N and A letter trials. Semantic fluency was defined as the total number of correct, non-repeated animals that an individual named in the animal naming trial.
What is categorical fluency?
Categorical verbal fluency tests (CFT) are commonly used to assess the integrity of semantic memory in individuals with brain damage. Persons with Dementia of the Alzheimer’s Type display a reduced output on CFT, and a similar pattern has been reported in persons with amnesic Mild Cognitive Impairment (aMCI).
How do you score FAS?
Scoring for the F-A-S Test is straightforward. The examiner writes each word as it is produced by the individual. The transcript is reviewed and inadmissible words (e.g., repetitions, proper names, or slang) are eliminated. The test score is the total number of different words produced for all three letters.
How do you perform a verbal fluency test?
- The verbal fluency test (VFT) is a short screening test that evaluates cognitive function.
- The person is asked to list all of the animals he can think of in the next 60 seconds.
- To score the VFT, count up the total number of animals or words that the individual is able to produce.
What does verbal fluency assess?
Verbal fluency is a cognitive function that facilitates information retrieval from memory. Tests of verbal fluency evaluate an individual’s ability to retrieve specific information within restricted search parameters (Lezak, Howieson, Loring, Hannay, & Fischer, 2004).
What does the FAS measure?
Description. The F-A-S Test, a subtest of the Neurosensory Center Comprehensive Examination for Aphasia (NCCEA; Spreen & Benton, 1977), is a measure of phonemic word fluency, which is a type of verbal fluency. The two most common parameters are semantic fluency and phonemic fluency.