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. 2016 Nov 17;3(6):ENEURO.0167-16.2016. doi: 10.1523/ENEURO.0167-16.2016

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Copyright © 2016 Gruber and Thapa

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International, which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.

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Figure 2. — Within-session changes of dependent variables. A, Mean response time (from nose-poke to feeder) over 15 consecutive trials and all animals in Fig. 1. Response time increases throughout the session after trial 30, suggesting a progressive decrease in motivation. B, Mean number of licks before reinforcement, which decreases within the session. The number of these anticipatory licks correlates strongly with the total number of licks at each feeder within the session (inset). C, Mean probability of lose-shift, which increases within the session and negatively correlates with licking (inset). D, Mean ITI after loss trials decreases within session. The within-session variance of lose shift correlates strongly with the log of the within-session ITI after losses (inset). Error bars indicate SEM.