Presents a mathematical model of the development of reaching behavior in infants, along with the results of two experiments that showed that infant movements could be decomposed into the underlying submovements using a principled method; and the angular error in infant reaches matches the form and magnitude of error assumed by the model. (MDM)

Comments on G. Zivin's model of expressive behavior development, presenting support for (1) affect-induced and (2) spontaneously generated emotion and expressive behavior. Argues that these phenomena are mediated by sensorimotor and sensory-perceptual processes. (HOD)

Thirteen infants were presented with a moving object under two lighting conditions to investigate the role of vision in early reaching. Infants were tested twice, at 5 and 7.5 months of age. The results suggest that proprioceptive feedback and sight of the target allowed for successful reaching with limited visual information, even in relatively…