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. 2014 Jun 17;8:220. doi: 10.3389/fnbeh.2014.00220

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Copyright © 2014 Mangieri, Cofresí and Gonzales.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Testing of 10S10E groups. (A) The number of lever presses per session declined across testing for the 10S10E VR (triangles), but not the 10S10E VI (squares) group. ^***Indicates for the VR group the sessions that were significantly different from session 1 (p < 0.001 level of significance for post-hoc contrasts). (B) The different patterns of behavioral adaptation were still apparent when test performance was expressed relative to training performance. (C) The number of reinforcers received per session increased similarly for the two groups across testing, but the 10S10E VR group received more reinforcers overall.