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Kirton has asserted that his measure of creative style, Kirton Adaption-Innovation Inventory, is discrete or orthogonal to level measures of creativity. This study used a well-established measure, the Torrance Tests of Creative Thinking, on a relatively larger sample than in previous studies. Scores for 132 (40 men, 92 women) college students on Kirton's measure were significantly correlated with scores on Torrance's Fluency, Flexibility, and Originality subtests. Further, t tests showed a significant difference between the extreme adaptor and innovator groups for fluency.
Isaksen et al. (1988) studied this question.