A factorial study of fluency was undertaken to test an hypothesis that at least two fluency abilities would be measured by a battery composed both of word fluency tests used by Thurstone and tests of fluency described by several British investigators. Twenty-eight tests, including ten reference tests for five primary mental abilities, were administered to 181 high-school seniors. Ten centroid factors were extracted, a simple structure was found, and eight factors were interpreted. Five factors defined were the following reference abilities: memory (M), number (N), reasoning (R), verbal comprehension (V), and perceptual speed (P), the last one being somewhat tentatively identified. The main finding is the analysis of fluency into two factors: word fluency (W) and ideational fluency (F). Word fluency is defined as a facility in producing single, isolated words that contain one or more formal restrictions, without reference to the meaning of the words. Ideational fluency is described as a

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number n reasoning memory word fluency tests formal restrictions single isolated words battery perceptual speed verbal comprehension ideational fluency factorial study of fluency

Calvin W. Taylor,.A factorial study of fluency in writing. 12 (4),239-262.

Calvin W. Taylor,"A factorial study of fluency in writing" 12

Calvin W. Taylor,"A factorial study of fluency in writing"