The Psychometric Properties of Cattell Fluid Intelligence Scale in Gifted Students

The present research examined the practicality, reliability, validity and norming of Cattell's Fluid Intelligence Scale (Scale 3, Form A). 435 gifted high school students (215 girls, 220 boys) in the academic year of 2010-2011 were selected by multistage random sampling method and completed Scale 3, Form A of Cattell Fluid Intelligence Scale (Cattell, 1978). Based on the correlation coefficient of each item with the overall score of the scale and factor analysis of the scale items, no item was omitted. Cronbach's alpha coefficient was estimated at 0.783. Results of principal component analysis and oblique rotation for determining construct validity led to the extraction of four factors: memory span, perception accuracy, perception speed and reasoning by induction. Findings were in accordance with the Cattell Fluid Intelligence Theory.