Learning disabilities are challenging to characterize because they evolve throughout development, frequently co-occur, and have varying domain specificity. Addressing these challenges, we analyzed longitudinal patterns of growth, co-occurrence, and specificity manifesting in the math and reading skills of children with and without learning…

This study investigated developmental trajectories of reading and math using latent-growth-curve analyses across multiple academic skills, measures, and multiple time periods within a single sample. Reading-related growth was marked by significant individual differences during the early elementary-school period and nonsignificant individual…

This study examined the longitudinal relationship between early handwriting skills and the growth of spelling and reading skills in a large sample (N = 569) of 5- to 6-year-old children unselected for ability. The quality of children's handwriting was assessed using five indicators (letter form, slant, rhythm, ability, general appearance).…

This cross-sectional study measures decoding and fluent reading skills of a random sample of 250 first- through third-grade students attending a high-SES school. Growth was compared between proficient and struggling readers with results showing the latter group significantly behind their higher attaining peers on all measures. When student…