Statistical analysis
Statistical analyses were performed using R version 4.1.2 (USA). Reaction time (in milliseconds (ms)) and accuracy (binary outcome) of the target stimuli were the dependent variables, while ROI thickness and protocol were the independent variables. Missed responses were considered errors, and reaction times <200 ms and >2500 ms were not considered genuine responses and were excluded (Secondly, as a supplementary analysis, we investigated the association between the working memory performance after the combined protocol only and cortical thickness using the same GLMM structures described above.All results were considered significant at a P threshold of 0.05. As the analyzed brain regions were hypothesis-driven, we did correct for multiple testing, similar to what was done previously (