Beth Joseph

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Two experiments were conducted to examine differences between people with Prader-Willi syndrome and an obese comparison group in choosing a larger quantity of food delivered after a delay (15, 30, or 60 seconds) or a small quantity of food delivered immediately. Individuals with Prader-Willi syndrome selected the larger food quantity. Choices by the obese(More)
Since its inception, the John F. Kennedy Center has attempted to overcome developmental problems, which create restrictive barriers to the participation of individuals with specific disabilities in our broader society. Some of Nicholas Hobbs's earliest efforts involved developing strategies for preventing children's emotional and behavior problems, which(More)
The transfer of social attributions within stimulus-equivalence classes comprised of photographs of children was examined. Five children (mean age: 4 yr., 2 mo.) were taught conditional discriminations sufficient for the emergence of two 3-member equivalence classes (A1-B1-C1 and A2-B2-C2). Social attributions were established by using two photographs to(More)
Adults with Prader-Willi syndrome learned the conditional relations necessary for the formation of two equivalence classes under four conditions: (a) nondifferential, nonedible outcomes; (b) nondifferential, edible outcomes; (c) differential, nonedible outcomes; and (d) differential, edible outcomes. Tests for transitive relations revealed superior(More)
Seventeen patients with Prader-Willi syndrome (7 with paternal deletion of chromosome 15q11-q13 and 10 with maternal uniparental disomy [UPD]), and 9 controls performed a computerized visual recognition task. A series of color digital photographs were presented; most were presented twice, but the remainder appeared only once. Photographs presented twice(More)
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