Two Factor Analytic Studies of Dyslexic Sub‐types

S ummary . A factor analysis was carried out on psychometric data from each of two separate dyslexic populations, using an orthogonal solution. The first analysis, performed on 640 children referred for clinical assessment, yielded four factors. The first two represented literacy and intelligence factors respectively. Factor 3 indicated an auditory dysfunction and Factor 4 a visual/verbal dysfunction. The second analysis, performed on 180 children screened for literacy problems, yielded three factors—Factor 1 suggested an auditory problem similar to Factor 3 of the clinical sample, Factor 2 a visual/verbal problem similar to Factor 4 of the clinical sample, and Factor 3 a literacy factor. The results are discussed in the context ( a ) of previous sub‐type classification studies and ( b ) of Vellutino's (1979) verbal mediation hypothesis

Context (archaeology) · Developmental psychology · Factor (programming language) · Literacy · Child Development and Digital Technology · Language Development and Disorders · Psychology · Reading and Literacy Development