Figure 7.

HDDM drift rate estimates for source memory. In each panel, columns denote encoding task (left: self-reference task, right: valence task), and colors denote normative valence (blue: positive, red: negative). Error bars in panel (a) represent 95% HDIs. Error bands in panel (b) represent 95% bootstrap confidence intervals (Waskom et al., 2017). In Panel (b), dashed vertical lines denote standard cutoffs for mild, moderate, and severe depression. Panel (a) depicts more efficient evidence accumulation towards a “self-reference” response for positive vs. negative words from the self-reference task, but less efficient accumulation towards a “valence” response for positive vs. negative words from the valence task. Panel (b) demonstrates that as BDI scores increase, drift rate increases (towards a “self-reference” response) for negative words but decreases (towards a “valence” response) for positive words, regardless of task.