Heikki Lyytinen|Jane Erskine|Asko Tolvanen|Minna Torppa|Anna?Maija Poikkeus|Paula Lyytinen
Trajectories of Reading Development: A Follow-up From Birth to School Age of Children With and Without Risk for Dyslexia
University of Jyväskylä|University of Jyväskylä|University of Jyväskylä|University of Jyväskylä|University of Jyväskylä|University of Jyväskylä
order understand children vulnerable difficulties language development acquisition reading skill jyvskyl longitudinal study dyslexia followed 200 finnish children birth school age half children family history reading problems considered risk dyslexia half risk novel analysis mixture modeling revealed four subgroups differential developmental trajectories early reading subgroups showed either dysfluent trajectory n 12 11 risk vs 1 control declining trajectory n 35 24 vs 11 contained children familial risk dyslexia subgroup showing unexpected trajectory contained equal numbers atrisk nonrisk children n 67 33 vs 34 subgroup displaying typical trajectory n 85 38 vs 47 contained children born without dyslexia risk differential development skills revealed least three troubled routes along child may ultimately encounter difficulties reading acquisition explicit routes characterized problems either phonological awareness naming speed letter knowledgeproblems increase severity age