Modelling relations between sensory processing, speech perception, orthographic and phonological ability, and literacy achievement.
The general magnocellular theory postulates that dyslexia is the consequence of a multimodal deficit in the processing of transient and dynamic stimuli. In the auditory modality, this deficit has been hypothesized to interfere with accurate speech perception, and subsequently disrupt the development of phonological and later reading and spelling skills. In the visual modality, an analogous problem might interfere with literacy development by affecting orthographic skills. In this prospective longitudinal study, we tested dynamic auditory and visual processing, speech-in-noise perception, phonological ability and orthographic ability in 62 five-year-old preschool children. Predictive relations towards first grade reading and spelling measures were explored and the validity of the global magnocellular model was evaluated using causal path analysis. In particular, we demonstrated that dynamic auditory processing was related to speech perception, which itself was related to phonological awareness. Similarly, dynamic visual processing was related to orthographic ability. Subsequently, phonological awareness, orthographic ability and verbal short-term memory were unique predictors of reading and spelling development.
Boets
Bart
B
Centre for Disability, Special Needs Education and Child Care, Faculty of Psychology and Educational Sciences, Katholieke Universiteit Leuven, Belgium. bart.boets@ped.kuleuven.be
Wouters
Jan
J
van Wieringen
Astrid
A
De Smedt
Bert
B
Ghesquière
Pol
P
D000161:Acoustic Stimulation / Q000379:methods; D001076:Aptitude / Q000502:physiology; D001309:Auditory Threshold; D002663:Child Language; D002675:Child, Preschool; D015331:Cohort Studies; D004410:Dyslexia / Q000503:physiopathology* / Q000523:psychology; D004522:Educational Status; D005260:Female; D006801:Humans; D007807:Language Tests; D008137:Longitudinal Studies; D008297:Male; D008570:Memory, Short-Term / Q000502:physiology; D008954:Models, Biological; D010700:Phonetics; D011446:Prospective Studies; D011601:Psychophysics / Q000379:methods; D011932:Reading; D012677:Sensation / Q000502:physiology*; D012684:Sensory Thresholds; D013060:Speech / Q000502:physiology; D013067:Speech Perception / Q000502:physiology*; D013068:Speech Production Measurement / Q000379:methods; D014705:Verbal Behavior / Q000502:physiology