The researcher shows a graphical feedback procedure effectiveness to boost breakfast plates stripping rate, which is cleaning) for a young female who is mentally retarded. The subject in this study was 22 years old women, and on Wechsler Intelligence Scale for children her IQ scored was 42. This research is conducted in a hospital kitchen where plates were washed in a format of the production line. In this study, the dependent variable was the speed of stripping plates in a minute. Independent variable in this study was concerning work rate for ...