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. Author manuscript; available in PMC: 2007 Mar 26.
Published in final edited form as: J Exp Psychol Anim Behav Process. 2006 Jul;32(3):271–283. doi: 10.1037/0097-7403.32.3.271

Table 1.

Design of Experiments 1 and 2

Group Preexposure Phase 1 inhibition training Phase 2 transfer training Summation test Retardation training Retardation test
Pav-Ret 4 X−/4 Y− 36 A→US/60AX− 4 B→US BY 4 X→US X
Pav-Sum 4 X−/4 Y− 36 A→US/60AX− 4 B→US BX 4 Y→US Y
Dif-Ret 4 X−/4 Y− 36 A→US/60X− 4 B→US BY 4 X→US X
Dif-Sum 4 X−/4 Y− 36 A→US/60X− 4 B→US BX 4 Y→US Y

Note. X and Y = white noise and tone, counterbalanced; A = flashing light; B = clicks; US = footshock. → denotes followed by. − denotes no reinforcement. Pav = Pavlovian inhibition training; Dif = differential inhibition training; Ret = retardation; Sum = summation. Numbers next to the pairings indicate total number of each type of trial during training. Note that the same experimental design as well as total number of trials was used in Experiments 1 and 2, with the only differences being the intertrial interval (and total session length) during inhibition training, which was 14.5 min in Experiment 1 and 117 s in Experiment 2.