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. Author manuscript; available in PMC: 2007 Apr 26.
Published in final edited form as: Learn Behav. 2007 Feb;35(1):27–35. doi: 10.3758/bf03196071

Table 2.

The design of Experiment 2

Group Phase 1 in Context A Phase 2 in Context A Phase 3 in Context B Test X in Context B
Ctrl-Spaced 8 X→O (577.5) 8 A (577.5) 8 O→US (228) CR
Ctrl-Massed 8 X→O (90) 8 A (90) 8 O→US (228) Cr
RI-Spaced 8 X→O (577.5) 8 A→O (577.5) 8 O→US (228) Cr
RI-Massed 8 X→O (90) 8 A→O (90) 8 O→US (228) ?

Note: Ctrl = Control, RI = Retroactive Interference, Spaced = relatively spaced ITIs (577.5 s), Massed = relatively massed ITIs (90 s), X = complex tone, A = clicks, O = white noise, US = footshock. The strength of the expected conditioned response is denoted by the size of the CR. The question mark denotes an uncertain outcome.