Abstract
Four groups of eight rats received either no shock or 35-, 45-, or 55-V shocks in a runway equipped to allow measurement of activity immediately before a trial began. Suppression of activity (i.e., freezing) was significant for each shock group and was significantly and monotonically related to shock intensity.
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This work was completed while the author was at Colgate University.
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Klare, W.F. Activity level and secondary motivation: Fear. Bull. Psychon. Soc. 3, 171–172 (1974). https://doi.org/10.3758/BF03333431
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DOI: https://doi.org/10.3758/BF03333431