A self-teaching system using a personal computer was examined for three institutionalized adults with mental retardation to acquire reading the name of person, objects and chinese numericals. The system was consisted of a personal computer (NEC PC-9801) , a touch panel, a speech synthesizer ("Oshaberi-kun") , a small speaker unit, and an original soft-ware (MATCH) . The contents of self-teaching were some conditional discrimination (matchig-to-sample) tasks, in which three kinds of stimulus sets, "word" written by chinese character or kana, "picture", and "auditory word" were presented as a sample and/or comparison stimuli. A subject started the session by inserting a floppy disk into the computer and initiated a discrimination trial by producing visual or auditory sample stimulus, and terminated by the choise response to the one of the four comparison stimuli. One of the two graphical figures following each choise response informed the subject whether the response was correct or incorrect. A11 three subjects were able to manipulate the computer with a few instructions, and the post test showed two of three subjects could learn some sets of the names of per-son and numerical through the conditional discrimination.
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