Fig. 3: Behavioral results of seven Pigeons.
From: Extinction context is learned by pigeons, not given by the environment
A Animals successfully acquired the novel stimuli discrimination in Experiment I and II while retaining high discrimination performance for familiar stimuli (9 trials per block, depicted are mean and standard error across all animals and sessions). B Extinction of novel stimuli occurred within the first 20 to 30 trials (i.e., in the second or third block). Rewarded discrimination performance for familiar stimuli stayed high. C In Experiment I, both environmental information (Envirn. red) and local stimuli (dark blue) resulted in renewal. Reponses were significantly higher for the local stimuli. In Experiment II the reduction of contiguity of the local stimuli (Local -, light blue) abolished renewal. Repetitions of the extinction protocol reduced the amount of renewal across sessions and experiments. Renewal test started after the end of block 5 in (B). Triangles indicate means; dots represent individual data points.
