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. Author manuscript; available in PMC: 2007 Feb 8.
Published in final edited form as: J Exp Psychol Anim Behav Process. 2006 Oct;32(4):396–406. doi: 10.1037/0097-7403.32.4.396

Table 1.

Design of Experiment 1

Group Phase 1,Blocking A, 3 days Phase 2,Blocking B, 3 days Test
Blocking 12A+/3AX+ 12B+/3BX+ X
Control 12C+/3AX+ 12D+/3BX+ X

Note. A, B, C, and D = competing stimuli; X = target cue; + = footshock. Numbers next to the pairings indicate total number of trials in that phase. Slashes indicate interspersed trials.