Stimulus preference assessment with immediate versus delayed item access

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Foidart, Brennan
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For individuals with severe intellectual or developmental disabilities, communicating preferences can be a monumental task. In order to help identify what a person likes or prefers, a formal stimulus preference assessment can be conducted with the individual. Typically, when examining preference in people with developmental disabilities, the individual being tested is given access to their chosen item immediately after a response is made. However, there are many items and activities in everyday situations that cannot be accessed immediately. The present study evaluated whether immediate or delayed access to items during a paired-stimulus preference assessment impacted preference hierarchy concordance for three people with developmental disabilities. The preference hierarchies between immediate and delayed access conditions were positively correlated for all three participants, with Tau coefficients ranging from .35 to .91, although they were not statistically significant. The most preferred item identified in the delayed condition was also the most preferred item in the immediate access condition for two of the three participants.
access, choice, paired-stimulus, stimulus preference assessment access