We evaluated an inexpensive, efficient, and noninvasive technique for measuring tissue damage produced by self-injurious behavior (SIB). The technique involved computerized measurement of wound surface area (WSA) based on digital photographs. In Study 1, we compared photographic measurement to a more commonly used procedure, transparency…

In order to maximize the learning of skills, it is crucial that the most powerful reinforcement be used. Research describes several different methods of reinforcement preference assessments, including forced choice, free-operant, and multiple stimulus array procedures. Researchers have also tested many variables to determine their potential impact…