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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 Jan;32(1):21–32. doi: 10.1037/0097-7403.32.1.21

Table 1.

Design of Experiment 1

Group Training Test
Elem-NDeg X→US (18)/X- (18) X
Ov-NDeg AX→US (18)/AX- (18) X
Elem-Deg X→US (18)/US (108)/X- (18) X
Ov-Deg AX→US (18)/US (108)/AX- (18) X

Note. Numbers in parentheses next to the pairings indicate total number of each type of trial during training. → = “followed”; X = click train; A = tone; US = foot shock; Elem = elemental training; Ov = overshadowing (compound training); Deg = degraded contingency; NDeg = no degraded contingency.