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Direct linkWilliams, Lynne J.; Abdi, Herve; French, Rebecca; Orange, Joseph B. – Journal of Speech, Language, and Hearing Research, 2010
Purpose: In communication disorders research, clinical groups are frequently described based on patterns of performance, but researchers often study only a few participants described by many quantitative and qualitative variables. These data are difficult to handle with standard inferential tools (e.g., analysis of variance or factor analysis)…
Descriptors: Discriminant Analysis, Statistical Inference, Alzheimers Disease, Dementia
Dyck, Murray J.; Piek, Jan P.; Patrick, Jeff – Research in Developmental Disabilities: A Multidisciplinary Journal, 2011
We tested whether developmental coordination disorder (DCD) and mixed receptive expressive language disorder (RELD) are valid diagnoses by assessing whether they are separated from each other, from other childhood disorders, and from normality by natural boundaries termed zones of rarity. Standardized measures of intelligence, language, motor…
Descriptors: Attention Deficit Hyperactivity Disorder, Mental Retardation, Autism, Social Cognition
