Abstract
Two students with multiple disabilities were provided with two or three request microswitches and one choice microswitch. Activation of a request microswitch triggered the verbal announcement of one of the stimulus events related to it. The student could choose such an event through the choice microswitch or bypass it. The request microswitches were introduced individually and made available simultaneously by the end of the intervention and the postintervention period. Analysis showed that both students learned to use the microswitches. Transfer of the microswitch program into the students' home was very successful with one student and presented some difficulties with the other. Implications of the findings and new possible developments were discussed.
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