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Direct linkRapin, Isabelle – Journal of Autism and Developmental Disorders, 2014
Three levels of investigation underlie all biologically based attempts at classification of behaviorally defined developmental and psychiatric disorders: Level A, pseudo-categorical classification of mostly dimensional descriptions of behaviors and their disorders included in the 2013 American Psychiatric Association's Fifth Edition of the…
Descriptors: Classification, Developmental Disabilities, Mental Disorders, Behavior Disorders
Ingram, David G.; Takahashi, T. Nicole; Miles, Judith H. – Journal of Autism and Developmental Disorders, 2008
The purpose of the present study was to determine which behavioral and physical phenotypes would be most likely to divide the ASD population into discrete subgroups. The taxometric methods of Maximum Covariance (MAXCOV) and Minus Mean Below A Cut (MAMBAC) were employed to test for categorical versus continuous variation of each phenotype across…
Descriptors: Autism, Perceptual Motor Learning, Interpersonal Relationship, Interaction
Stevenson, Jim; Asherson, Phil; Hay, David; Levy, Florence; Swanson, Jim; Thapar, Anita; Willcutt, Erik – Developmental Science, 2005
The genetic study of ADHD has made considerable progress. Further developments in the field will be reliant in part on identifying the most appropriate phenotypes for genetic analysis. The use of both categorical and dimensional measures of symptoms related to ADHD has been productive. The use of multiple reporters is a valuable feature of the…
Descriptors: Psychopathology, Genetics, Attention Deficit Hyperactivity Disorder, Classification
