Exploratory analysis
Finally, we analyzed the association of the subjective ratings with the time variables session and session phase as well as with cortical oxygenation by fitting mixed models, separately for each ROI and each subjective rating. Note that we included only training trials in this analysis to reduce the complexity of the models. The results are to be found in Results of the mixed models exploring the association between the subjective ratings, cortical oxygenation in the different ROIs, sessions and session phases in the training trials(Session:Phase:WP_OBeta-estimates and standard errors in brackets. AIC = Akaike Information Criterion; BIC = Bayesian-Information-Criterion; RPlease note that we also performed the analysis with no auto-regressor, as well as with non-centered predictors which yielded the same results (see 