The Creativity Crisis-The Decrease in Creative Thinking Scores on the Torrance Tests of Creative Thinking The Torrance Tests of Creative Thinking (TTCT) was developed in 1966 and renormed five times: in 1974, 1984, 1990, 1998, and 2008.

Research Population & Sample Size

The total sample for all six normative samples included 272,599 kindergarten through 12th grade students and adults.

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