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It is also unknown how great the capacity to improve these skills with focused and extensive practice is.<\/jats:p><\/jats:sec><jats:sec><jats:title>Method<\/jats:title><jats:p>We studied initial performance and learning capacity in a sequential finger tapping (FT) task in WS and in typical development. Improvement in the FT task has been shown to be sleep dependent. WS subjects participating in the current study have also participated in earlier polysomnography studies, although not directly related to learning.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>WS participants presented with great individual variability. In addition to generally poor initial performance, learning capacity was also greatly limited in WS. We found indications that reduced sleep efficiency might contribute to this limitation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Estimating motor learning capacity and the depth of sleep disorder in a larger sample of WS individuals might reveal important relationships between sleep and learning, and contribute to efficient intervention methods improving skill acquisition in WS.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jir.12317","type":"journal-article","created":{"date-parts":[[2016,8,3]],"date-time":"2016-08-03T11:10:28Z","timestamp":1470222628000},"page":"956-968","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Capacity to improve fine motor skills in Williams syndrome"],"prefix":"10.1111","volume":"60","author":[{"given":"A.","family":"Berencsi","sequence":"first","affiliation":[{"name":"Laboratory for Psychological Research P\u00e1zm\u00e1ny P\u00e9ter Catholic University  Budapest Hungary"},{"name":"B\u00e1rczi Guszt\u00e1v Faculty of Special Education, Institute for Methodology of Special Education and Rehabilitation E\u00f6tv\u00f6s Lor\u00e1nd University  Budapest Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F.","family":"Gombos","sequence":"additional","affiliation":[{"name":"Laboratory for Psychological Research P\u00e1zm\u00e1ny P\u00e9ter Catholic University  Budapest Hungary"},{"name":"Department of General Psychology P\u00e1zm\u00e1ny P\u00e9ter Catholic University  Budapest Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"I.","family":"Kov\u00e1cs","sequence":"additional","affiliation":[{"name":"Laboratory for Psychological Research P\u00e1zm\u00e1ny P\u00e9ter Catholic University  Budapest Hungary"},{"name":"Department of General Psychology P\u00e1zm\u00e1ny P\u00e9ter Catholic University  Budapest 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