Fig. 3: Effect of age on foraging behaviour.

A Average stay durations (over trials and participants) for each task condition are plotted separately for young (magenta) and older adults (red), together with optimal performance (black). B Average stay durations plotted separately for the fast and slow decay rate conditions, and separately for young and older adults. Error bars indicate two standard errors. C Same as (B) but for the principal component (PC) scores for the first (PC1) and second PC (PC2). D Regression coefficients for the linear model predicting participant overstaying/scaling (stay duration PC1). Age, Apathy Evaluation Scale score (aes_score), Patient Health Questionnaire-9 (phq_score), Tower of London accuracy (tol_acc), median reaction time for correct responses in Tower of London (tol_rtc_med), and median reaction times in reaction time task (rtt_rt_med) were all included as predictors in the model. Error bars indicate 2 standard errors. E Same as (D), bur for the association with a preference for best condition (stay duration PC2). F The two components of PC1, namely offset and scale, plotted separately for young and older adults. Error bars indicate 2 standard errors.