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An attribute is a feature of a product.
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A profile is a specification of product attributes.
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A choice set is a collection of profiles.
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A survey is a collection of choice sets.
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A partial profile is a profile in a choice design where only a specified number of attributes are varied within each choice set. The remaining attributes are not varied.
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In cases where many attributes are involved, you can construct surveys where each choice set contains partial profiles. In a choice set with partial profiles, only a specified number of attributes are varied and the remaining attributes are held constant. This reduces the complexity of the choice task.