Delayed matching to sample: reinforcement has opposite effects on resistance to change in two related procedures
Learning & Behavior (2012) - Comment
pubmed: 22205622  doi: 10.3758/s13420-011-0059-x  issn: 1543-4508  issn: 1543-4494 

John A. Nevin, Timothy A. Shahan, Amy L. Odum, Ryan Ward