1 This paper appeared in Journal of Autism and Developmental Disorders , 1999, 29, 407-418. A new test of social sensitivity: Detection of faux pas in normal children and children with Asperger syndrome: Simon Baron-Cohen, Michelle O’Riordan Valerie Stone, Rosie Jones & Kate Plaisted. Departments of Experimental Psychology and Psychiatry University of Cambridge Downing Street Cambridge. CB2 3EB, U.K. Acknowledgments : Experiments 1 and 2 reported here were carried out by M.A. O’Riordan and R. Jones as part fulfillment of a Part II Project in Experimental Psychology, University of Cambridge. M.A. O’Riordan and S. Baron-Cohen were supported by the MRC during the period