. Author manuscript; available in PMC: 2007 Feb 8.

Published in final edited form as: J Exp Psychol Anim Behav Process. 2006 Jan;32(1):21–32. doi: 10.1037/0097-7403.32.1.21

Table 3.

Design of Experiment 3

Group	Phase 1	Phase 2	Phase 3	Test
Deg-Elem-NExt	X→O (10)/O (20)	ctx	O→US (8)	X
Deg-Ov-NExt	AX→O (10)/O (20)	ctx	O→US (8)	X
Deg-Elem-Ext	X→O (10)/O (20)	CTX	O→US (8)	X
Deg-Ov-Ext	AX→O (10)/O (20)	CTX	O→US (8)	X

Note. Numbers in parentheses next to the pairings indicate total number of trials in that phase. → = “followed by”; X = click train; A = tone; O = white noise; US = foot shock; Deg = degraded contingency; Elem = elemental training; Ov = overshadowing (compound training); Ext = extinction; NExt = no extinction; ctx = 5-min daily context exposure; CTX = 150-min daily context exposure.