Third, Dr. Gepner’s own work (his references 3–5) suggests that lower-functioning individuals with autism (i.e., those with a degree of mental retardation) are impaired in the processing of physical environmental movement, particularly rapid movement, while higher functioning individuals with autism (i.e., those without accompanying mental retardation) are less impaired in such tasks. In other words, low-functioning children do worse than high-functioning children on visual tasks involving rapid movement. Applying this notion to the discussion of our results and those of van der Geest and colleagues, Dr. Gepner hypothesizes that the discrepancy may be due to the severity of individuals with autism included in the two studies, with our participants being more cognitively disabled than those included in the study by van der Geest and colleagues. Inspection of subject characterization data on the two studies does not support this hypothesis. The participants in our study were both older and more cognitively able than the group of participants in the study by van der Geest and colleagues. In fact, the viewer with autism whose individual eye-tracking data were described and illustrated in detail in our review article was a 38-year-old man who has been followed-up in our center for most of his life and who has a very impressive list of accomplishments, including college graduation in a competitive institution and two master’s-level degrees. He was, nevertheless, quite socially disabled and appeared to have a typical manifestation of autism in a cognitively able individual.