Place an infant between 6 and 12 months of age in an upright sitting position in front of a table or tray. One at a time, place six small objects in front of the infant; the objects should vary in...

Place an infant between 6 and 12 months of age in an upright sitting position in front of a table or tray. One at a time, place six small objects in front of the infant; the objects should vary in size, weight, and shape (all should be small enough for an infant to pick up with one hand). Consult figure 9.1 and note the type of grip the infant uses for each object. Be careful not to let the infant put small objects in his or her mouth because they can pose a choking hazard. Next, repeat the process to see whether the infant uses the same grip on each object as in the first round. Finally, prepare a report on the different grips you observed for the various objects; be sure to distinguish between power grips and precision grips. Discuss whether or how the grips changed as the weight or shape of the object changed.