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Wakeman, Holly N.; Wadsworth, Sally J.; Olson, Richard K.; DeFries, John C.; Pennington, Bruce F.; Willcutt, Erik G. – Journal of Learning Disabilities, 2023
This study investigated the relationship between mathematics difficulties and psychopathology in a large community sample (N = 881) of youth (8-18 years of age) in the United States. The primary aims of the study were to (a) test the associations between mathematics difficulties and specific components of internalizing, externalizing, attention,…
Descriptors: Children, Adolescents, Correlation, Learning Problems
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Peterson, Robin L.; McGrath, Lauren M.; Willcutt, Erik G.; Keenan, Janice M.; Olson, Richard K.; Pennington, Bruce F. – Journal of Learning Disabilities, 2021
Despite historical emphasis on "specific" learning disabilities (SLDs), academic skills are strongly correlated across the curriculum. Thus, one can ask how specific SLDs truly are. To answer this question, we used bifactor models to identify variance shared across academic domains (academic "g"), as well as variance unique to…
Descriptors: Learning Disabilities, Elementary School Students, Secondary School Students, Clinical Diagnosis