McGraw and the Development of Unaided Walking

McGraw's research and theoretical principles concerning early neuromotor development are reexamined in light of contemporary research—primarily for unaided walking. McGraw studied emergence of higher order control of neuromotor behavior with special emphasis on development from the neonate's reflexive repertoire to the onset of purposive behavior toward the end of the first year. Contemporary research supports and clarifies her observations providing greater detail about the factors involved in the formation of higher order control and amplifying the role of experience, particularly for decreasing disorganization during periods of transition. The development from reflexive to instrumental control is clarified as an alternative to the disorganized phase and to the “disappearance” of “reflexive” behaviors. A cognitive metamorphosis at the end of the first year not only explains the onset of qualitatively new behaviors, including purposive neuromotor actions, but provides the infant with characteristics that define our species: unaided walking, functional object use, and naming. Possible mechanisms underlying this transition are discussed in terms of the emergence of a higher level of consciousness.