Form Paired Stimulus (PS) Preference Assessment

The Paired Stimulus method of conducting Stimulus Preference Assessments (SPAs) is sometimes referred to as a Forced Choice Assessment. Stimuli, such as objects or activities, are presented sequentially, in pairs, in random order. Every stimulus is presented systematically with every other stimulus at least twice (ideally, once on the left and once on the right to control for position bias). The individual’s choice is recorded following each presentation, and stimuli can then be ranked based on selection percentage (selections/presentations X 100).

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