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2. Unpublished report;Drew, G.C.,1941
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4. Freeman, G. L. & Pathman, J. H. (1942). J. exp. Psychol., 30, 161.
5. Errors became less frequent, but their correction was tardy and they were larger. Movements of the controls were often;Geier, F.M.; Tolman, E.C.,1943