Are Autism Spectrum Disorders and Attention-Deficit/Hyperactivity Disorder Different Manifestations of One Overarching Disorder? Cognitive and Symptom Evidence From a Clinical and Population Based Sample

J. M. J. Van der Meer1,2, A. M. Oerlemans2,3, D. J. van Steijn2, M. G. A. Lappenschaar4, L. M. J. de Sonneville5, J. K. Buitelaar2,6 and N. N. J. Rommelse2,3, (1)Department of Cognitive Neuroscience, Radboud University Medical Centre Nijmegen, Donders Institute for Brain, Cognition and Behavior, Nijmegen, Netherlands, (2)Karakter Child and Adolescent Psychiatry University Centre Nijmegen, Nijmegen, Netherlands, (3)Department of Psychiatry, Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behavior, Nijmegen, Netherlands, (4)Institute for Computing and Information Science, Radboud University, Nijmegen, Netherlands, (5)Leiden Institute for Brain and Cognition, Leiden University, Leiden, Netherlands, (6)Department of Cognitive Neuroscience, Radboud University Nijmegen Medical Centre, Donders Institute for Brain, Cognition and Behavior, Nijmegen, Netherlands