Figure 4.

Mean (± SE) skin conductance responses to blue test slides (conditioned stimulus positive unpaired with unconditioned stimulus, solid line and closed symbols) and red control slides (conditioned stimulus negative, dashed line and open symbols) across conditioning phases in: (A) control and (B) conduct disorder groups. Control participants showed enhanced differential conditioning, as shown by a larger difference between skin conductance responses to the conditioned stimulus positive and the conditioned stimulus negative during acquisition phase 1 and acquisition phase 1, relative to conduct participants. ACQ1, acquisition phase 1; ACQ2, acquisition phase 2; CD, conduct disorder; CS–, conditioned stimulus negative; CS+, conditioned stimulus positive; EXT, extinction phase; HAB, habituation phase; SCR, skin conductance response.