Discrimina？？o simples com mudan？as sucessivas na fun？？o dos estímulos: aprendizagem em bebês

this study investigated the acquisition of repeated shifts of simple discriminations (rssd) in three infants. animated images were presented on a touch sensitive screen. the procedure started off with a two-choice simple discrimination training (sd) with shifts in the stimulus function until all stimuli had functioned once as s+ and once as s-. afterwards, all the three stimuli were presented in the same trial completing a rssd cycle. two of the infants learned the rssd with the two-choice procedure and one infant learned the sd with two stimuli. the replacement of the stimulus sets throughout the training, characterized as a multiple exemplar training, seems to have contributed to the infants' engagement in the task as well as to the acquisition of the discriminations.