Demographic characteristics of those who were successful in solving the Type 2 problem vs those who failed.

Values are presented as mean ± standard error of the mean. Neither age (p = 0.255, 2 tailed independent t test), gender (p = 1, 2-tailed Fisher's exact test), time required in completing the mental set phase (p = 0.36, 2 tailed independent t test), or experience in a quantitative field (p = 0.36, 2-tailed Fisher's exact test) is a predictor of success in solving the Type 2 problem. In other words, there is no evidence that those in the L− R+ group had superior performance because of confounding baseline attributes.