This study examined changes in rhythmic arm shaking and laterality biases in infants observed longitudinally at three points: just prior to, at, and just following reduplicated babble onset. Infants (ranging in age from 4 to 9 months at babble onset) were videotaped at home as they played with two visually identical audible and silent rattles…

An evaluation of research in the area of perceptual training suggests procedures for teachers to follow until more definitive information is obtained. First, educators should build their programs on broadly-based but accurate classifications of perceptual skills. They should also be aware of the theoretical assumptions which influence perceptual…