Ig. Deleon et al., The effects of noncontingent access to single- versus multiple-stimulus sets on self-injurious behavior, J APPL BE A, 33(4), 2000, pp. 623-626
The automatically reinforced self-injury of a girl with autism was treated
by providing noncontingent access to a single set of preferred toys during
30-min sessions. The reductive effects of the intervention waned as the ses
sion progressed. Rotating toy sets after 10 min or providing access to mult
iple toy sets resulted in reductions that lasted the entire 30 min.