Explicit and implicit motor sequence learning: motor learning analysis in children with Down syndrome. [Aprendizaje explícito e implícito de la secuencia motora: análisis del aprendizaje motor en niños con síndrome de Down].

Sayed Kavos Salehi, Fatema Sadat Talebrokni, Negar Miri-Lavasani, Alborz Hajipour



The purpose of the present study was to explore explicit and implicit motor sequence learning in 24 children with Down's syndrome (DS) and 24 matched typically developing (TD) children using a serial reaction time (SRT) task with both random and regular trials. The intervention was consisted of 10 stages (8 blocks for acquisition and 2 blocks for retention) in which the performances of groups were compared. In acquisition phase, our results showed a progress in the performance of SRT task in all groups while performing the SRT task. In addition, in retention phase, the results showed that children with DS succeed as well as TD children at the implicit motor sequence learning task. There were no significant differences between groups. But there was a significant difference between groups for explicit learning and the group of TD explicit children showed a reliable sequence learning pattern compared to DS children. These results are in line with the cognitive and motor features of the DS children and suggest that implicit motor learning is intact in children with DS but explicit motor learning seems to be impaired in these children. Nevertheless, this article provides preliminary data regarding implicit learning in DS children and further empirical research is needed to provide more meticulous and logical explanations. From a practical view, we suggest that during the education and rehabilitation interventions to children with DS, we can make use the benefits of implicit learning, because these children can learn skills implicitly.


El propósito del presente estudio fue explorar el aprendizaje de secuencias motoras explícitas e implícitas en 24 niños con síndrome de Down (DS) y 24 niños con un desarrollo típico (TD) pareados utilizando una tarea de tiempo de reacción en serie (SRT) con ensayos aleatorios y regulares. La intervención consistió en 10 etapas (8 bloques para adquisición y 2 bloques para retención) en las que se compararon los rendimientos de los grupos. En la fase de adquisición, nuestros resultados mostraron un progreso en el desempeño de la tarea SRT en todos los grupos al realizar la tarea SRT. Además, en la fase de retención, los resultados mostraron que los niños con SD tienen éxito, así como los niños con TD en la tarea de aprendizaje de la secuencia motora implícita. No hubo diferencias significativas entre los grupos. Pero hubo una diferencia significativa entre los grupos para el aprendizaje explícito y el grupo de niños explícitos con TD mostró un patrón de aprendizaje de secuencia confiable en comparación con los niños con SD. Estos resultados están en línea con las características cognitivas y motoras de los niños con SD y sugieren que el aprendizaje motor implícito está intacto en los niños con SD, pero el aprendizaje motor explícito parece estar afectado en estos niños. Sin embargo, este artículo proporciona datos preliminares sobre el aprendizaje implícito en niños con SD y se necesita más investigación empírica para proporcionar explicaciones más meticulosas y lógicas. Desde un punto de vista práctico, sugerimos que durante las intervenciones de educación y rehabilitación para niños con SD, podamos aprovechar los beneficios del aprendizaje implícito, porque estos niños pueden aprender habilidades de manera implícita.



Atwell, J. A.; Conners, F. A., & Merrill, E. C (2003). Implicit and explicit learning in young adults with mental retardation. American Journal on Mental Retardation, 108(1), 56–68.

Bittles, A. H.; Bower, C.; Hussain, R., & Glasson, EJ (2007). The four ages of Down syndrome. European Journal of Public Health, 17(2), 221-5.

Brown, J.; Aczel. B., Jiménez, L.; Kaufman, S. B., & Grant, K. P. (2010). Intact implicit learning in autism spectrum conditions. The Quarterly Journal of Experimental Psychology, 63(9), 1789-812.

Bussy. G.; Charrin. E.; Brun, A.; Curie, A., & des Portes, V. (2011). Implicit procedural learning in fragile X and Down syndrome. Journal of Intellectual Disability Research, 55(5), 521-8.

Chiviacowsky, C.; Machado, C.; Marques, A. C.; Schild J. F. G., & Drews R. (2013). Motor learning and Down syndrome: effects of reduced relative frequency of knowledge of results. Revista Brasileira de Cineantropometria & Desempenho Humano, 15, 225-232.

Cuskelly, M.; Jobling, A., & Buckley, S. (Eds.). (2002). Down syndrome across the life span. Philadelphia, PA: Whur Publishers.

Deborah, J.; Fidler, L., & Nadel, N. (2007). Education and Children with Down syndrome: Neuroscience, Development, and intervention. Mental retardation and developmental disabilities. Research reviews, 13(3), 262-271.

Dienes, Z.; Broadbent, D. E., & Berry, D. C. (1991). Implicit and explicit knowledge bases in artificial grammar learning. Journal of Experimental Psychology: Learning, Memory, and Cognition, 17(5), 875–887.

Dulany, D. E.; Carlson, R. A., & Dewey, G. I. (1984). A case of syntactical learning and judgment: How conscious and how abstract? Journal of Experimental Psychology: General, 113(4), 541–555.

Eichenbaum, H.; Matthew, P., & Cohen, N. J. (1989). Further studies of hippocampal representation during odor discrimination learning. Behavioral Neuroscience, 103(6), 1207-1216.

Fletcher, J.; Maybery, M.T., & Bennett, S. (2000). Implicit learning differences: A question of developmental level? Journal of Experimental Psychology: Learning, Memory and Cognition, 26(1), 246-252.

Fowler, A. (1995). Linguistic variability in persons with Down syndrome: Research and implications. In L. Nadel & D. Rosenthal (Eds.). Down syndrome: Living and learning in the community (121-131). New York: Wiley- Liss.

Gabriel, A.; Stefaniak, N.; Maillart, C.; Schmitz, X., & Meulemans, T. (2012). Procedural visual learning in children with specific language impairment. American Journal of Speech-Language Pathology, 21(4), 329-341.

Garvey, M.; Ziemann, U.; Bartko, J.; Denckla, M.; Barker, C., & Wassermann, E. (2003). Cortical correlates of neuromotor development in healthy children. Clinical Neurophysiology. 114(9), 1662-1670.

Gentile, A. M. (1998). Movement science: Implicit and explicit processing during acquisition of functional skills. Scandinavian Journal of Occupational Therapy, 5(1), 7-16.

Hick, R. F.; Botting, N., & Conti-Ramsden, G. (2005). Short-term memory and vocabulary development in children with Down syndrome and children with specific language impairment. Developmental Medicine and Child Neurology, 47(8), 532–538.

Izadi-Najafabadi, S.; Mirzakhani-Araghi, N.; Miri-Lavasani, N.; Nejati, V., & Pashazadeh-Azari, Z.  (2015). Implicit and explicit motor learning: Application to children with Autism Spectrum Disorder (ASD). Research in Developmental Disabilities, 47(December), 284-296.

Janacsek, K. J.; Fiser, D., & Nemeth, D.  (2012). The Best Time to Acquire New Skills: Age-related Differences in Implicit Sequence Learning across Human Life Span. Developmental Science, 15(4), 496–505.

Karatekin, C.; Marcus, D. J., & White, T. (2007). Oculomotor and manual indexes of incidental and intentional spatial sequence learning during middle childhood and adolescence. Journal of Experimental Child Psychology, 96(2), 107–130.

Kirkham, N.; Slemmer, J.; Richardson, D., & Johnson, S. (2007). Location, location, location: Development of spatiotemporal sequence learning in infancy. Child Development, 78(5), 1559-1571.

Klinger, L., & Dawson, G. (2001). Prototype formation in autism. Development and Psychopathology, 13(1), 111–124.

Lang, C., & Schieber, M. (2004). Human finger independence: limitations due to passive mechanical coupling versus active neuromuscular control. Journal of Neurophysiology. 92(5), 2802-2810.

Lejeune, C.; Catale, C.; Willems, S., & Meulemans. T. (2013). Intact procedural motor sequence learning in developmental coordination disorder. Research in Developmental Disabilities, 34(6), 1974-1981.

Maas, E.; Robin, D. A.; Hula, S. N. A.; Freedman, S. E.; Wulf, G; Ballard, K. J., & Schmidt, R. A. (2008). Principles of Motor Learning in Treatment of Motor Speech Disorders, American Journal of Speech-Language Pathology, 17(3), 277-98.

Maybery, M.; Taylor, M., & O’Brien-Malone, A. (1995). Implicit learning: Sensitive to age but not to IQ. Australian Journal of Psychology, 47(1), 8–17.

Meulemans, T.; Van der Linden, M., & Perruchet, P. (1998). Implicit sequence learning in children. Journal of Experimental Child Psychology, 69(3), 199–221.

National Down syndrome Society. (2017). Down syndrome fact sheet. http://www.ndss.org/

Nejati V.; Garusi Farshi M. T.; Ashayeri H., & Aghdasi M. T. (2008). Dual task interference in youth and elderly in explicit and implicit sequence learning. International Journal of Geriatric Psychiatry, 23(8), 801–804.

Nissen, M. J., & Bullemer, P. (1987). Attentional requirements of learning: Evidence from performance measures. Cognitive Psychology, 19(1), 1-32.

Oldfield, R. (1971). The assessment and analysis of handedness: The Edinburgh inventory. Neuropsychologia, 9(1), 97-113.

Perruchet, P, & Vinter, A. (2002). The self-organizing consciousness. Behavioral and Brain Sciences, 25(3), 297–330.

Rast, M., & Meltzoff, A. (1995). Memory and representation in young children with Down syndrome: Exploring deferred imitation and object permanence. Development and Psychopathology, 7(3), 393–407.

Raven, J. C., Court, J. H., & Raven, J. (1990). Manual for Raven’s Coloured Progressive Matrices. Oxford: Oxfords Psychologists Press.

Reber, A. S. (1976). Implicit learning of synthetic languages: The role of instructional set. Journal of Experimental Psychology: Learning, Memory and Cognition, 2, 88–94.

Reber, A. S. (1993). Implicit learning and tacit knowledge: An essay on the cognitive unconscious. New York: Oxford University Press.

Reber, A. S.; Walkenfeld, F.F., & Hernstadt, R. (1991). Implicit and explicit learning: Individual differences and IQ. Journal of Experimental Psychology: Learning, Memory, and Cognition, 17(5), 888.

Reilly K., Hammond G. (2006). Intrinsic hand muscles and digit independence on the preferred and non-preferred hands of humans. Experimental Brain Research. 173(4), 564–571.

Robertson, E. M. (2007). The serial reaction time task: Implicit motor skill learning? Journal of Neuroscience, 27(38), 10073–10075.

Roizen, N. J., Patterson, D. (2003). Down's syndrome. Lancet (Review)361(9365), 1281-89.

Salehi, S. K.; Sheikh, M.; Hemayattalab, R., & Humaneyan, D. (2016).  The Effect of Different Ages levels and explicit - implicit Knowledge on Motor Sequence Learning. International Journal of Environmental and Science Education, 11(18), 13157-65.

Schacter, D. L. (1992). Understanding implicit memory: A cognitive neuroscience approach. American Psychologist, 47(4), 559–569.

Sweeney, J. A.; Rosano, C; Berman, R. A., & Luna, B. (2001). Inhibitory control of attention declines more than working memory during normal aging. Neurobiology of Aging, 22(1), 39–47.

Taylor, J. A., & Ivry, R.B. (2013). Implicit and explicit processes in motor learning. In P.W.M. Beisert A, Herwig (Eds.), Action science (pp. 63–87). Cambridge, MA: The MIT Press.

Thomas K.; Hunt; Vizueta N.; Sommer T.; Durston S., Yang Y., & Worden M. (2004). Evidence of developmental differences in implicit sequence learning: an fMRI study of children and adults. Journal of Cognitive Neuroscience, 16(8), 1339–1351.

Thomas, K. M., & Nelson, C. A. (2001). Serial reaction time learning in preschool and school-age children. Journal of Experimental Psychology, 79, 364–387.

Tulving, E., & Schacter, D. L. (1990). Priming and human memory systems. Science, 247(4949), 301–306.

Vicari, S. (2006). Motor development and neuropsychological patterns in persons with Down syndrome. Behavior Genetics, 36, 355–364.

Vicari, S.; Bellucci, S., & Carlesimo, G. A. (2000). Implicit and explicit memory: A functional dissociation in persons with Down syndrome. Neuropsychologia, 38(3), 240–251.

Vicari, S.; Verucci, L., Carlesimo, G. A. (2007). Implicit memory is independent from IQ and age but not from etiology: evidence from Down and Williams syndromes. Journal of Intellectual Disability Research, 51(12), 932-41.

Vinter, A. & Detable, C. (2008). Implicit and explicit motor learning in children with and without Down’s syndrome. British Journal of Developmental Psychology. 26(4), 507-523.

Weeks, D. J.; Chua, R., & Elliott, D. (2000). Perceptual – motor behavior in Down syndrome. Champaign, IL: Human Kinetics.

Wolf, P.; Gunnoe, C., & Cohen, C. (1983). Associated movements as a measure of developmental age. Developmental Medicine & Child Neurology. 25(4), 417-429.

Wright, I.; Lewis, V., & Collis, G. M. (2006). Imitation and representational development in young children with Down syndrome. British Journal of Developmental Psychology, 24(2), 429 -450.

Palabras clave/key words

Down syndrome; Serial reaction time task; Implicit and explicit motor learning; Motor sequence; síndrome de Down; tarea de tiempo de reacción en serie; aprendizaje motor implícito y explícito; secuencia motora.

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RICYDE. Revista Internacional de Ciencias del Deporte
Publisher: Ramón Cantó Alcaraz
ISSN:1885-3137 - Periodicidad Trimestral / Quarterly
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