págs. 267-278
Flattering generalization gradients, context, and perceptual learning
James Byron Nelson, María del Carmen Sanjuan Artegain
págs. 279-289
Evidence for the interchangeability of an avoidance behavior and a negative occasion setter
Mieke Declercq, Jan de Houwer
págs. 290-300
págs. 301-310
Partial reinforcement effects on learning and extinction of place preferences in the water maze
José Prados
págs. 311-318
Memory span for heterospecific individuals' odors in an ant, "Cataglyphis cursor"
Emmeline Foubert, Elise Nowbahari
págs. 319-326
Michael F. Brown
págs. 327-340
págs. 341-351
Preference for rewards that follow greater effort and greater delay
Jérôme Alessandri
pág. 352