Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

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

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

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.

PMC Copyright notice

Training of 10S groups. (A) Lever pressing by 10S VI (circles) and 10S VR (triangles) groups across training sessions. The numbers in parentheses beneath the session numbers on the x-axis indicate the programmed reinforcement criteria in effect for each group during that session (average time interval, in seconds, before a press yielded reinforcer delivery for the VI group/average number of lever presses required by VR group for reinforcer delivery). (B) The two groups did not differ in the cumulative number of reinforcers received across all training sessions.