Running Head: Neurocognitive Characteristics of ADHD and CD 1 Neurocognitive Characteristics of Youth with Noncomorbid and Comorbid Forms of Conduct Disorder and Attention Deficit Hyperactivity Disorder 1 Andrea L. Glenn a , Rheanna J. Remmel a , Min Yee Ong b , Nikki SJ Lim c , Rebecca P. Ang d , A. Hunter Threadgill e , Nicole Ryerson e , Adrian Raine f , Daniel Fung c , Yoon Phaik Ooi c,g a Center for the Prevention of Youth Behavior Problems, Department of Psychology, University of Alabama, USA b Singapore Institute for Clinical Sciences (A*STAR), Singapore c Department of Child and Adolescent Psychiatry, Institute of Mental Health, Singapore d Psychological Studies, National Institute of Education, Nanyang Technological University, Singapore e Department of Psychology, University of Alabama, USA f Department of Criminology, University of Pennsylvania, USA g Clinical Psychology and Psychotherapy, Department of Psychology, University of Basel, Switzerland Address correspondence to: Andrea Glenn Department of Psychology, The University of Alabama Box 870348, Tuscaloosa, AL 35487 Tel: 205-348-4340; Fax: 205-348-3526; Email: alglenn1@ua.edu 1 This is a post-print of the manuscript accepted for publication in Comprehensive Psychiatry. The final version will be available on Science Direct by Elsevier.