Clearly, the A-not-B error cannot be about a failure to represent an object’s existence if the object is in full view. Rather, DST behavioral analysis suggests that changes in motor components at two different timescales affected behavioral change: reaches made over the course of an experiment and motor stability over the course of development. Thus, this work dem- onstrates that the behavior is not just about cognitive-level processes but about the body as well—the representation of things in the world is tightly coupled to the dynamics of the body