What characterizes a multiple stimulus without replacement (MSWO) preference assessment?

A multiple stimulus without replacement (MSWO) preference assessment is characterized by the systematic removal of items selected by the individual during each trial of the assessment. This means that once a participant chooses an item from the presented set, that item is not returned to the pool for subsequent trials. This allows for a more accurate representation of the individual's preferences over time as the assessment progresses, since the remaining items continue to reflect those that have not yet been chosen.

In this type of assessment, the goal is to identify which items are most preferred by continuously narrowing down the choices based on selections made. As each trial is completed, the chosen item is permanently removed from the available options, which can help in determining the relative desirability of other items. Thus, the concept of "without replacement" is crucial, as it influences the way preferences are evaluated throughout the assessment process.