In the present study we extended errorless learning to a conditional temporal discrimination. Pigeons' responses to a left-red key after a 2-s sample and to a right-green key after a 10-s sample were reinforced. There were two groups: One learned the discrimination through trial and error and the other through an errorless learning procedure.…

Trained preschoolers and adults on three sets of successive discriminations with stimuli labeled A, B, and R. Tested for derived stimulus-response relations and stimulus-stimulus relations. Adults displayed class-consistent B-R and A-B performances over all conditions. Children's display of class-consistent B-R performance varied by training…

There is no a priori basis for assuming that theories of social psychology are universal. For theories to be universal, the meaning of the stimulus would have to be consistent across cultures, but this cannot be taken for granted. Cross-cultural variations in social behavior may be "surface" expressions of deep structure norms that are universal.…