Argues that the developmental origins of actions are actions themselves and that a future-oriented mode of control is basic to movement at all ages. Suggests that, through active movement, children learn about changing and invariant properties of movement and about coordination with the external world. This learning constitutes the foundation of…

Comments on the article by von Hofsten in this issue by examining four of von Hofsten's propositions: (1) physical actions are expressions of self-organizing systems composed of bodily, task-related, motivational, and environmental factors; (2) the ability to perform actions develops with age; (3) action is situated in a total postural background;…

From a symposium on Cross-Cultural Studies of Mother-Infant Interaction at the Biennial Meeting for Research in Child Development, Minneapolis, Minn., April 2, 1971. (MB)