However, in our experiments, there were several situations in which individuals with autism visually tracked, inspected, and reacted appropriately to moving objects (e.g., a moving glass held by one of the movie protagonists, an opening door, a swinging lamp) as well as movement cues. Figure 6 in our article (p. 903) actually shows that a person with autism reacted more quickly than a typical viewer to a moving cue and with equal accuracy. On the basis of our observations, the scanning patterns of a typical viewer were not different from those of a viewer with autism in their general response to moving stimuli; rather, they differed in specific response to the social components of the stimuli, as opposed to the nonsocial physical aspects (whether static or not). In fact, there were situations in which a face was stationary for as long as 15 seconds and yet the fixation patterns exhibited by the viewer with autism still revealed a preference for the mouth area rather than the facial area (as in Figure 3, p. 900). Although not included in this article, of the time that the viewer with autism looked at faces, he or she spent 14.2% on the eye area and 85.8% on the mouth area, contrasted with 77.8% and 22.2%, respectively, for the typical viewer (χ2=8.77, df=1, p=0.003). This greater fixation time for mouths was further corroborated in our case-control series (1). Among the various elements of the face, when people are talking the mouth is probably the one that moves the most. In light of this, it is unclear how focus on the mouth, as described in the letter by Drs. Kemner and van Engeland, could reflect an effort by viewers with autism "to overcome a basic perceptual problem," defined as difficulty in processing moving objects.