THOMAS, D R A test of the "units hypothesis" employing wave-length generalization in human subjects. [electronic resource] - Journal of experimental psychology Jan 1963 - 59-62 p. digital Publication Type: Journal Article ISSN: 0022-1015 Standard No.: 10.1037/h0040670 doi Subjects--Topical Terms: EmploymentGram-Positive CocciHumansLearning