This study focuses on improving purposeful arm use while simultaneously reducing engagement in stereotypies. It is typically expected that the training period for this study will last about 6 months. The first half of the training periods will be devoted to learning to separate hands to stop the stereotypies that interfere with arm and hand use. In this first half, participants will also need to learn to keep arms apart in order to be actively involved in the chosen game. The second half of the training period will be devoted to learning to stop stereotypies and reach for targets that are intended to start game play. When not touching the targets, the software will interpret that the game should stop and wait for the next target to be touched.
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Counts and timing of obligatory stereotypies
Timeframe: 60 min functional assessment periods: one just before start of intervention (baseline) and one at the end of intervention (post-intervention testing) Weekly data collection from intervention sessions: enrollment to end of intervention 26 weeks later.
Timing and number of separations (ceasing stereotypies)
Timeframe: Two 60 minute assessment periods: one just before start of intervention (baseline) and one at the end of intervention (post-intervention testing). Data from intervention sessions will run from enrollment to end of intervention 26 weeks later.
Reaching data for number of reaches and amount of time reaching occurs
Timeframe: Two 60-minute assessment periods: one at baseline and one post final intervention session. Data from weekly intervention will be gathered from enrollment to 26 weeks later when intervention is complete.