The coordination of manipulation and visual fixation: a response to Schaffer (1975)

The present study was conducted to clarify the issues raised by Schaffer and Rubenstein about perceptual-motor integration in 6-month-old infants. The visual and motor responses to novel and familiar stimuli were measured in 12 6-month-old infants, using new measures of integration and concordance. The results indicate that the infants' responses to the stimuli were both integrated and concordant. Schaffer's conclusions, which are based on studies that show changes from 6 to 9 months of age, are discussed in light of the findings of the present study.