Journal
BRAIN SCIENCES
Volume 11, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/brainsci11040427
Keywords
brain event-related potentials (ERPs); language development; dyslexia; home literacy environment; intervention; longitudinal study; prospective family study; reading fluency; reading development; reading difficulties
Categories
Funding
- Academy of Finland
- Centre of Excellence Programs [44858, 213486]
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The Jyvaskyla Longitudinal Study of Dyslexia (JLD) found that auditory insensitivity in newborns is the first precursor of dyslexia, while early oral language skills and phonological processing skills can predict dyslexia and reading development from a young age.
This paper reviews the observations of the Jyvaskyla Longitudinal Study of Dyslexia (JLD). The JLD is a prospective family risk study in which the development of children with familial risk for dyslexia (N = 108) due to parental dyslexia and controls without dyslexia risk (N = 92) were followed from birth to adulthood. The JLD revealed that the likelihood of at-risk children performing poorly in reading and spelling tasks was fourfold compared to the controls. Auditory insensitivity of newborns observed during the first week of life using brain event-related potentials (ERPs) was shown to be the first precursor of dyslexia. ERPs measured at six months of age related to phoneme length identification differentiated the family risk group from the control group and predicted reading speed until the age of 14 years. Early oral language skills, phonological processing skills, rapid automatized naming, and letter knowledge differentiated the groups from ages 2.5-3.5 years onwards and predicted dyslexia and reading development, including reading comprehension, until adolescence. The home environment, a child's interest in reading, and task avoidance were not different in the risk group but were found to be additional predictors of reading development. Based on the JLD findings, preventive and intervention methods utilizing the association learning approach have been developed.
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