In which preference assessment method are individuals permitted to choose each item only once?

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The correct answer is that in the multiple stimulus without replacement preference assessment method, individuals are allowed to select each item only once. This approach involves presenting a set of items to the individual, who will make their selection from the options available. After one item is chosen, it is removed from the array for subsequent trials, meaning it cannot be chosen again during that session. This method helps to identify preferences without reintroducing previously chosen items, allowing for a clearer understanding of the hierarchy of preferences among the items presented.

In contrast, the multiple stimulus with replacement method allows an individual to choose an item, and that item remains available for selection in future trials. This means they can select the same item multiple times, which does not align with the requirement of only choosing each item once.

The single stimulus method focuses on presenting items one at a time, without any option to choose between multiple options simultaneously. This method does not incorporate the concept of item selection more than once.

The free operant preference assessment involves allowing individuals to interact with items freely over a set period of time but does not limit them from selecting the same item multiple times, which also differs from the condition described in the question.

Thus, the unique characteristic of the multiple stimulus without replacement method—each

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