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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 2.

Design of Experiment 3

Group Preexposure Phase 1 inhibition training Phase 2 extinction Phase 3 transfer training Summation test Retardation training Retardation test
NExt-Ret 4 X−/4 Y− 36 A→US/60 AX− ctx 4B→US BY 4X→US X
NExt-Sum 4 X−/4 Y− 36 A→US/60 AX− ctx 4B→US BX 4Y→US Y
Ext-Ret 4 X−/4 Y− 36 A→US/60 AX− CTX 4B→US BY 4X→US X
Ext-Sum 4 X−/4 Y− 36 A→US/60 AX− CTX 4B→US BX 4Y→US Y

Note. X and Y = white noise and tone, counterbalanced; A = flashing light; B = clicks; US = footshock. → denotes followed by. − denotes no reinforcement. ctx denotes brief context exposure. CTX denotes prolonged context extinction. Ret = retardation; Sum = summation; NExt = no context extinction; Ext = context extinction. Numbers next to the pairings indicate total number of each type of trial during training.