Figure 2

Behavioral results. (A) Accuracy of the source-discriminations. Mean accuracy of the Place/Time source discrimination (+ /− sem), as a function of the subsequent confidence rating (“high/low”). Place and Time discrimination followed by high-confidence responses were significantly above chance level (marked with asterisks in the plot), while source discriminations with low-confidence were not significantly different from the 50% chance level. (B) Logistic regression. Regression coefficients (logit, ± 95% confidence intervals) of the binomial logistic regression seeking to predict changes of the proportion of Rem-responses during episode retrieval using the accuracy and confidence of the subsequent source-memory tests. The model included 5 predictors: the intercept (int), the accuracy of the place- and time-discrimination, irrespective of confidence (Place and Time) and the effect of correct and confident source judgments (P:CF and T:CF), see also Results section. The results showed a significant contribution of correct source memory on the subjective quality of episode-retrieval, increasing the likelihood of Rem-responses specifically when the sources were discriminated with high-confidence (see "P:Cf" and "T:Cf" on the left side of the plot).