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. Author manuscript; available in PMC: 2017 Apr 4.
Published in final edited form as: Conductual. 2015 Apr;3(1):4–25.

Figure 7.

Figure 7

The arbitrary (AB) successive matching baseline task and the symmetry (BA) probe trials appearing during testing in Urcuioli (2008, Experiment 3). (The two remaining baseline tasks are omitted for clarity). Sample stimuli are shown to the left of the arrows, and comparison stimuli are shown to the right of the arrows. “+” indicates trials ending in food reinforcement; “−” indicates trials ending without food reinforcement. “(p)” denotes test trials that are the reverse of the positive (reinforced) baseline trials; “(n)” denotes test trials that are the reverse of the negative (non-reinforced) baseline trials.