Palatability ratings
We excluded all palatability ratings from a given participant (from the analyses) if the participant did not complete the pre- or post-intervention palatability rating questionnaires.To ensure a thorough filling of the analogue scales, we excluded items with an RT shorter than 300 ms. We only considered trained items (those above the median before the intervention) in the analysis. For each participant, we calculated the mean ratings after trimming the 20% highest and the 20% lowest rated items at pre-intervention from the healthy and unhealthy item distribution, to only target the items with room to change, thus preventing ceiling and floor effects.We defined outlier participants as those outside the 2.5*MAD range around the median (median average deviation; moderately conservative criterion