For ‘liking’, there was a nominally significant interaction between group and effort–reward condition [F(1.293, 75.007) = 3.897, p = 0.042, η 2 partial = 0.063], but it did not survive the Holm-adjusted significance threshold, so evidence for group differences in ‘liking’ adaptation should be regarded as tentative.
As shown in Table S8 , an independent samples t -test found that the β 1 coefficients in the SD group were lower than those in the HC group, and the difference for ‘liking’ approached borderline significance (‘wanting’: t (58) = −1.659, p = 0.103, Cohen’s d = −0.428; ‘liking’: t (58) = −1.948, p = 0.056, Cohen’s d = −0.503), which was directionally consistent with the ANOVA pattern but did not provide definitive evidence for group differences in adaptation slopes.