Fig. 3

Comparison of effects of extinction training on differential conditioning indices (mean responses to the CS + vs. CS-) between delay and trace conditioning. A–C. Self-report indices assessed immediately after acquisition vs. extinction training. D.-F. Physiological markers recorded during the post-acquisition phase vs. late extinction (i.e., average responses on the last four trials per CS). Note. Error bars: 95%CI. CS+: conditioned stimulus; CS-: never reinforced control stimulus; IBI: inter-beat interval; VAS: visual analogue scale. For reasons of clarity and comparability, responses of all physiological variables were converted to z-scores (within participants/sessions), and values of the extinction learning index for startle responses have been reverse-coded to reflect startle attenuation. Levels of significance: ** p < .01; * p < .05; # p < .10.