Table 1.

Stimulus Interactions

Procedure \ Competing stimuli	Cues	Outcomes
Stimuli trained together	Cell 1: Cue competition e.g., conventional blocking & overshadowing of cues	Cell 2: Outcome competition e.g., overshadowing & blocking of outcomes
Stimuli trained apart	Cell 3: Cue interference e.g., retroactive interference  X-O, A-O, test X-O & proactive interference  A-O, X-O, test X-O	Cell 4: Outcome interference e.g., retroactive interference  X-O1, X-O2, test X-O1 & proactive interference  X-O2, X-O1, test X-O1