Dissociable Forms of Inhibitory Control within Prefrontal Cortex with an Analog of the Wisconsin Card Sort Test: Restriction to Novel Situations and Independence from “On-Line” Processing

This work was supported by a University Research Fellowship Grant from the Royal Society (A.C.R.) and also by a Programme Grant from the Wellcome Trust (T.W.R., B. J. Everitt, A.C.R., B. J. Sahakian). Dr. R. Dias received a studentship from the Medical Research Council. We thank Dr. R. M. Ridley for supplying the marmosets, Ms. C. Morrison and Ms. H. Sweet for preparation of histological material, and Mr. J. Bashford and Mr. I. Bolton for photographic assistance.

Correspondence should be addressed to Dr. Angela C. Roberts, Department of Anatomy, University of Cambridge, Downing Street, Cambridge, CB2 3DY, UK.

Dr. Dias’s present address: School of Psychology, University of Wales, Cardiff, P.O. Box 901, Cardiff CF1 3YG, UK.