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. Author manuscript; available in PMC: 2010 Mar 22.
Published in final edited form as: Learn Behav. 2010 Feb;38(1):68–79. doi: 10.3758/LB.38.1.68

Table 1.

Design of Experiment 1

Group Phase 12 Phase 22 Phase 32 Test1
Inhib 48 A+/84 AB− 12 X+ 36 BX−/12 B−/12 X− X
Neutral 48 A+/84 AB− 12 X+ 36 CX−/12 B−/12 X− X
NoExt 48 A+/84 AB− 12 X+ 60 B− X
Ext 48 A+/84 AB− 12 X+ 48 X−/12 B− X

Note—CS A was a flashing light; CSs B and C were white noise and a high-frequency complex tone, counterbalanced within groups; CS X was a click train. “+” denotes reinforcement with a footshock. “−” denotes no reinforcement. Superscripts indicate context. Numbers preceding letters indicate the total number of trials in that phase.