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Results

#1. During a preference assessment for a client, a Behavior Analyst presents five different dishes (stimuli) simultaneously. After the client selects one dish, that chosen dish is immediately removed from the array, and the client is given the opportunity to consume it. The remaining four unselected dishes are then rearranged and presented again. This process is repeated until all items have been selected or a set number of trials are completed. What type of preference assessment is being described?

Single Stimulus Preference Assessment

Paired Stimulus Preference Assessment

Multiple Stimulus With Replacement (MSW)

Multiple Stimulus Without Replacement (MSWO)

This scenario describes a Multiple Stimulus Without Replacement MSWO preference assessment In an MSWO procedure multiple stimuli typically three or more are presented simultaneously to the individual When a stimulus is selected by the client it is removed from the array and not returned in subsequent trials The remaining unchosen stimuli are then represented in a new array for the next trial This process continues until all stimuli have been chosen or a predetermined number of trials is completed The key characteristic of MSWO is the removal of the selected item which allows for the creation of a clear hierarchy of preferences from the most preferred to the least preferred item In contrast in a Multiple Stimulus With Replacement MSW assessment the selected item is returned to the array and unchosen items might be replaced with new items or simply represented leading to repeated selection of highly preferred items

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