A one-trial learning color discrimination task was extrapolated from Jarvik's (1953) teaching color discrimination to primates. A yellow-blue discrimination was selected to teach eleven autistic children. As in Jarvik's, SD and SA, reinforcer and punisher, were one and the same. Sugar-flavored water was the S D alum-flavored water, S . The instrumental response of reaching for a colored glass and drinking was established. Then one-trial learning occurred. The learning tests were a block of twenty-five trials for each individual subject on the following day. The second day another block of twenty-five trials was administered to each subject. It was hypothesized that the subjects would function at a ninety per cent criterion level. None of the subjects learned the task.