pág. 215
Timing with opportunity cost: Concurrent schedules of reinforcement improve peak timing
Federico Sanabria, Eric A. Thrailkill, Peter R. Killeen
págs. 217-229
Representations of single and compound stimuli in negative and positive patterning
Justin A. Harris, Saba Gharaei, Clinton A. Moore
págs. 230-245
Shenghui Li, Ying Tian, Yu Ding, Xinming Jin, Chonghuai Yan
págs. 246-253
Heather T. Sissons, Gonzalo Urcelay, Ralph R. Miller
págs. 254-268
Social effects on spatial choice in the radial arm maze
Michael F. Brown, Toni-Moi N. Prince, Karen E. Doyle
págs. 269-280
Reward contrast in delay and probability discounting
Zhijie Dai, Randolph C. Grace, Simon Kemp
págs. 281-288