Post-hoc t -tests indicated that this was driven primarily by the increase in success rates between the 3- and 6-point reward levels, t (272) = 3.01, p = 0.008, d = 0.18, whereas the differences between 6 and 9 points, and 9 and 12 points did not achieve significance after Bonferroni-adjusting for multiple comparisons ( ps = 0.10 and 0.07, and, ds = 0.13 and 0.14, respectively).
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