Effects of discrimination training on stimulus generalization for human subjects.

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Abstract
3 GROUPS OF 15 SS EACH WERE GIVEN WAVELENGTH DISCRIMINATION TRAINING TO RESPOND TO THE S+ (530 MILLIMICRONS) BUT NOT TO S- (540, 550, AND 590 MILLIMICRONS, RESPECTIVELY). 15 CONTROLS RECEIVED INSTRUCTIONS TO RESPOND ONLY TO S+ BUT NO DISCRIMINATION TRAINING. ALL SS WERE THEN TESTED FOR GENERALIZATION TO WAVELENGTHS ON BOTH SIDES OF THE S+. RELATIVE TO THE CONTROL GRADIENT, BOTH THE 540 MILLIMICRON S- AND 550 MILLIMICRON S- GROUPS SHOWED DISPLACEMENT OF THE MODE OF RESPONDING FROM S+ IN THE DIRECTION OPPOSITE TO S-. CONTRARY TO THE ANIMAL LITERATURE, HOWEVER, THE 550 S- GROUP EXHIBITED THE GREATER DISPLACEMENT, AND THE 590 S- GROUP YIELDED A GRADIENT RELIABLY FLATTER THAN THAT OF THE CONTROL GROUP. THESE DISCREPANCIES ARE ATTRIBUTED TO HUMAN SS' USE OF STIMULUS LABELING AND CATEGORIZATION. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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