Implicit sequence learning is preserved in dyslexic children
This study investigates the implicit sequence learning abilities of dyslexic children using an artificial grammar learning task with an extended exposure period. Twenty children with developmental dyslexia participated in the study and were matched with two control groups—one matched for age and other for reading skills. During 3 days, all participants performed an acquisition task, where they were exposed to colored geometrical forms sequences with an underlying grammatical structure. On the last day, after the acquisition task, participants were tested in a grammaticality classification task. Implicit sequence learning was present in dyslexic children, as well as in both control groups, and no differences between groups were observed. These results suggest that implicit learning deficits per se cannot explain the characteristic reading difficulties of the dyslexics.
KeywordsArtificial grammar learning Children Dyslexia Implicit learning Reading acquisition
This work was supported by national Portuguese funding through Fundação para a Ciência e a Tecnologia, project ref. UID/BIM/04773/2013 CBMR, PTDC/MHC-PCN/1175/2014, and SFRH/BD/85439/2012.
- Blomert, L., & Vaessen, A. (2009). Differentiaal Diagnostiek van Dyslexie: cognitieve analyse van lezen en spellen [Dyslexia Differential Diagnosis: cognitive analysis of reading and spelling]. Amsterdam: Boom.Google Scholar
- Hedenius, M., Persson, J., Alm, P. A., Ullman, M. T., Howard, J. H., Howard, D. V, & Jennische, M. (2013). Impaired implicit sequence learning in children with developmental dyslexia. Research in Developmental Disabilities, 34(11), 3924–3935. https://doi.org/10.1016/j.ridd.2013.08.014
- Howard, J. H., Howard, D. V., Japikse, K. C., & Eden, G. F. (2006). Dyslexics are impaired on implicit higher-order sequence learning, but not on implicit spatial context learning. Neuropsychologia, 44(7), 1131–1144. https://doi.org/10.1016/j.neuropsychologia.2005.10.015.CrossRefGoogle Scholar
- Raven, J., Raven, J. C., & Court, J. H. (2009). CPM-P Matrizes Progressivas Coloridas (Forma Paralela). Lisboa: Cegoc.Google Scholar
- Rüsseler, J., Gerth, I., & Münte, T. F. (2006). Implicit learning is intact in adult developmental dyslexic readers: evidence from the serial reaction time task and artificial grammar learning. Journal of Clinical and Experimental Neuropsychology, 28(5), 808–827. https://doi.org/10.1080/13803390591001007.CrossRefGoogle Scholar
- Santos, A. S., & Castro, S. L. (2010). Aprender a ler e avaliar a leitura. O TIL: teste de Idade de Leitura (2nd ed.). Coimbra: Almedina.Google Scholar
- Shaywitz, S. (2003). Overcoming dyslexia. New York: Vintage Books.Google Scholar
- Stoodley, C. J., Harrison, E. P. D., & Stein, J. F. (2006). Implicit motor learning deficits in dyslexic adults. Neuropsychologia, 44(5), 795–798. https://doi.org/10.1016/j.neuropsychologia.2005.07.009.CrossRefGoogle Scholar
- van Witteloostuijn, M., Boersma, P., Wijnen, F., & Rispens, J. (2017). Visual artificial grammar learning in dyslexia: a meta-analysis. Research in Developmental Disabilities, 70, 126–137. https://doi.org/10.1016/j.ridd.2017.09.006
- Waber, D. P., Marcus, D. J., Forbes, P. W., Bellinger, D. C., Weiler, M. D., Sorensen, L. G., & Curran, T. (2003). Motor sequence learning and reading ability: is poor reading associated with sequencing deficits? Journal of Experimental Child Psychology, 84(4), 338–354. https://doi.org/10.1016/S0022-0965(03)00030-4.CrossRefGoogle Scholar
- Wagner, R. K., Torgesen, J. K., & Rashotte, C. A. (1994). Development of reading-related phonological processing abilities: new evidence of bidirectional causality from a latent variable longitudinal study. Developmental Psychology, 30(1), 73–87. https://doi.org/10.1037/0012-16184.108.40.206.CrossRefGoogle Scholar
- Wechsler, D. (2006). Wechsler intelligence scale for children (3rd ed.). Lisboa: Cegoc.Google Scholar