The present study investigates whether the ability to classify' on the basis of rules can be learned independently of memory for the specific instances used to teach the rules. Thirteen amnesic patients and 14 control subjects studied letter strings generated by an artificial grammar. Subjects were then shown new letter strings and were instructed to classify them as grammatical or nongrammatic...

Author Affiliations: Geisel School of Medicine at Dartmouth, Hanover, New Hampshire (Drs Ogrinc, Davies, Goodman, and Batalden); Dartmouth Institute for Health Policy and Clinical Practice, Hanover, New Hampshire (Drs Ogrinc, Davies, Goodman, Batalden, Davidoff, and Stevens); Department of Veterans Affairs Medical Center, White River Junction, Vermont (Drs Ogrinc, Davies, and Goodman); and Inst...

Linear and nonlinear categorization rule learning was examined in patients with Huntington’s disease (HD) and controls using the perceptual categorization task. In the linear condition, HD patients displayed an early-training deficit, whereas later in training, they were not statistically different from controls. In the nonlinear rule condition, HD patients displayed both an earlyand late-train...

Kenton P Arkill ([email protected]) Klaus Qvortrup ([email protected]) Tobias Starborg ([email protected]) Judith M Mantell ([email protected]) Carlo Knupp ([email protected]) Charles C Michel ([email protected]) Steve J Harper ([email protected]) Andy HJ Salmon ([email protected]) John M Squire ([email protected]) Dave O Bates (Da...

Larry R. Squire, Yael Shrager, and Daniel A. Levy Veterans Affairs Healthcare System, San Diego, California 92161, USA; Departments of Neurosciences, Psychiatry, and Psychology, University of California, San Diego, California 92093, USA; Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel, Gonda (Goldschmeid) Multidisciplinary Brain Research Center, Bar-Ilan Univers...

1 The paper is a part of the Global Research Project by the Global Development Network. We have benefited from comments by Gary McMahon and Lyn Squire. The views expressed belong to the authors and are not necessarily shared by the Word Bank and other GDN sponsors.