Effects of arousal on cognitive control: empirical tests of the conflict-modulated Hebbian-learning hypothesis.

Spearman’s rank correlation, which is less sensitive to (univariate) outliers than Pearson’s coefficient, was marginally significant, ρ = 0.38, p = 0.07, suggesting some evidence that people whose pupil diameter is more sensitive to Stroop conflict tend to have a larger ISPC effect.

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