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Severtson, Stevan G.; Hedden, Sarra L.; Martins, Silvia S.; Latimer, William W. – Journal of Learning Disabilities, 2012
This study used data from six neuropsychological measures of executive function (EF) and general intellectual functioning (GIF) administered to 303 regular users of heroin and/or cocaine as indicators in a latent profile analysis (LPA). Results indicated the presence of three profiles: impaired GIF and EF profile (30.8%), intact GIF and EF profile…
Descriptors: Attention Deficit Hyperactivity Disorder, Intelligence, Narcotics, Cocaine