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Results

#1. A BCBA is conducting a Multiple Stimulus With Replacement (MSW) preference assessment for a non-verbal client to identify potential reinforcers. In the initial array, the BCBA presents five distinct stimuli a toy train, a bubble wand, a board book, a soft blanket, and a light-up spinner. The client selects the bubble wand. Following the standardized MSW procedure, what should the BCBA do next to prepare for the subsequent assessment trial?

Remove the bubble wand from the array and present the remaining four items along with one new item.

Return the bubble wand to the array and replace the other four unselected items with new, distinct stimuli.

Present the bubble wand alone to verify its reinforcing value through a single-stimulus trial.

Present an entirely new array of five different stimuli, ensuring the bubble wand is not included.

The Multiple Stimulus With Replacement MSW preference assessment procedure involves presenting an array of three or more stimuli to the learner When the learner selects an item that selected item is immediately returned to the array for the next trial The unselected items from the previous array are then replaced with new novel stimuli This method allows the highly preferred items to remain consistently available across trials helping to identify consistent preferences while also sampling a wider range of potential reinforcers over the course of the assessment This is in contrast to Multiple Stimulus Without Replacement MSWO where selected items are removed from subsequent arrays The text clearly defines MSW we take three or more stimuli we present them we let the learner choose an item Whatever item they choose we put back and then we replace the other items with new items This description precisely matches the action outlined in the correct option

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