The test is an adaptation of the Thurstone's Word Fluency Test (Thurstone and Thurstone, 1962) which together with other spoken word fluency tests has been shown to be sensitive to frontal lobe lesions. This test was adapted to control for motor speed for use with patients with upper limb disability with the incorporation of a copy condition. The test has been shown to be independent of physical disability. The test has been repeatedly shown to be sensitive to ALS.
The test is an adaptation of the Thurstone's Word Fluency Test (Thurstone and Thurstone, 1962) which together with other spoken word fluency tests has been shown to be sensitive to frontal lobe lesions. This test was adapted to control for motor speed for use with patients with upper limb disability with the incorporation of a copy condition. The test has been shown to be independent of physical disability. The test has been repeatedly shown to be sensitive to ALS.