Fig. 4: Main results from classes analysis.

GD Class: Goal Directed Class. SR Class: Stimulus-Response Class. A Proportion of avoidance choices across conditions. Box-plots represent first, second (median) and third quartiles. Whiskers are drawn within the 1.5 interquartile range. B Predicted proportion of avoidance choices as a function of RTs (solid lines). Shaded areas: 95% credible intervals. Single points: observed avoidance rates over median RTs for each participant. C Observed proportion of avoidance responses, P(Avoid Angry), as a function of RTs within a 100 ms sliding window. Shaded areas: 95% bootstrapped Confidence Intervals. On the bottom: defective density distribution (i.e., weighted by the relative frequency of responses) of RTs for avoidance (solid) and approach (dotted) responses. Black dashed lines: chance level. D Proportion of avoidance responses by Condition (Unpredictable vs. Predictable) by Class and Experimental block. Vertical lines: within subjects 95% confidence interval. E Grand average iHR series (difference from baseline in BPM, Beats Per Minute) across conditions for the GD (n = 41) and SR (n = 14) classes. Thick dotted line: significant clusters for the Condition effect in the GD class. Vertical dashed lines: stimulus onset (doors’ opening) and end of response times. Thick lines: grand averages. Shaded areas: within subject 95% confidence intervals. F Grand average EMG peak-centered amplitude for Neutral (teal) and Threat (pink) trials for the GD (n = 36) and SR (n = 15) classes. Thick dotted line: significant cluster of Threat effect in the SR class. Shaded areas: within subject 95% confidence intervals. A–C and E–F₁: Results for the GD class (n = 61). A-C and E-F₂: Results for the SR class (n = 29). G Posterior parameter estimates for DDM drift-rate (v), boundary separation (a) and non-decision time (t0) by Class and Condition. Points: median estimate. Lines: 95%CrI. Note that green represents the Predictable Condition where the sample is combined between Experiments 2 and 3 (A–D, G), while red represents the Predictable Condition where the sample is only from Experiment 3 (E). Unpred Unpredictable condition, Pred Predictable condition, RT Response Time.