Reed, P., & Reynolds, G. (2013). Effect of a surprising downward shift in reinforcer value on stimulus over-selectivity in a simultaneous discrimination procedure. Learning and Motivation, 44(1), pp. 31-45. doi:10.1016/j.lmot.2012.05.007

Reed, Phil, and Gemma Reynolds. "Effect of a Surprising Downward Shift in Reinforcer Value On Stimulus Over-selectivity in a Simultaneous Discrimination Procedure." Learning and Motivation 44, no. 1 (2013): 31-45.

Reed, Phil, and Gemma Reynolds. "Effect of a Surprising Downward Shift in Reinforcer Value On Stimulus Over-selectivity in a Simultaneous Discrimination Procedure." Learning and Motivation 44.1 (2013): 31-45.