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Results
#1. A BCBA is conducting a Multiple Stimulus Preference Assessment with Replacement (MSW) for a client named Alex to identify preferred items. In the first array, Alex is presented with a toy truck (T), play-doh (P), a coloring book (C), bubbles (B), and a tablet (A). Alex selects the toy truck (T). Which of the following describes the correct procedure for the next trial in this MSW assessment?
A Multiple Stimulus Preference Assessment with Replacement MSW is a method used to identify a hierarchy of preferred items by allowing a learner to choose from an array of three or more stimuli The key differentiating feature of an MSW as explained in the text is what happens after an item is chosen 1 Chosen Item The item that the learner selects is put back into the array for the next trial This ensures that a highly preferred item can be chosen repeatedly across trials 2 Unchosen Items The items that were not chosen in the current trial are replaced with new items in the subsequent trial This allows for a continuous sampling of novel stimuli to maintain engagement and provide a broader assessment of preferences Therefore in the given scenario since Alex chose the toy truck T it must be returned to the array The unchosen items playdoh coloring book bubbles tablet are then swapped out for completely new different items The correct answer accurately reflects this procedure Lets look at why the other options are incorrect Option 1 describes a Multiple Stimulus Preference Assessment Without Replacement MSWO where the chosen item is removed from the array Option 3 incorrectly states that the unchosen items are presented again In an MSW the unchosen items are replaced with new ones Option 4 is a nonstandard procedure that does not align with either MSW or MSWO methodologies as it suggests keeping the chosen item in the array but making it unavailable which would confound the assessment
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