Robustness analyses
Primary analyses used different statistical models for the different measures. To make them comparable and check the robustness of findings, we conducted additional (not preregistered) analyses. For SEBR, we computed a 2 (group) × 2 (condition, i.e., CS+/CS−) × 20 (trial) LME model with trial number as a function of time across conditions. Additionally, for SCR to CS onset during acquisition, LME revealed a main effect group that was not apparent in the descriptive statistics. Hence, this analysis was repeated using the “nlme” package version 3.1.149 function lme().