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Increases in activity level have often been used to imply the presence of a heightened drive state. Frequently, drive is also anchored on the antecedent side to a condition of need. Research literature which bears on the relationship between need state and activity level is reviewed. Specifically, activity level is discussed in terms of food, water, sex, and activity deprivation. It is suggested that associative interpretations of activity level may be more meaningful than drive interpretations.

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