Observations were made of the incidence of pointing behavior among infants differing in age when a radio-controlled truck entered the room in which mother and infant were seated. Infants' reactions over 5 to 6 minutes were recorded on videotape. Recordings were analyzed to establish the incidence of pointing, handedness of pointing, whether pointing occurred when the object was moving or stationary, the incidence of concurrent vocalizations, and whether pointing occurred when the truck was near the infant or futher away. Subjects were 38 infants who were 6-10, 11-16, or 18-21 months of age. Findings indicated that index finger pointing was evident as early as 8.75 months; by 14 months it was accompanied by extensive vocalization and visual monitoring of parent and the truck. Pointing was most likely to occur when the truck was in "near" space and stationary. It is concluded that pointing may be differentiated from reaching as soon as it can be observed; pointing may involve processes of "focal" attention, and its expression may depend on cognitive developmental changes which allow a pre-existing, conjoint visual-tactual inspection process to be applied to objects out of reach. (RH)