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Sixty participants performed a sequence of planar hand movements on pre-test, acquisition, post-test and 24\u2009h post-training blocks, under 1 of 4 conditions: an observation group (OG), a slowed observation group (SOG), a random motion control group (RMCG) and a double physical training control group (DPTCG). The OG and SOG observed an expert model\u2019s right hand performing the study task intermittently throughout acquisition, RMCG observed random dots movement instead of a model. Participants in the DPTCG received extra physical practice trials instead of the visually observed trials. Kinematic analysis revealed that only in conditions with observation of an expert model there was an instant robust improvement in motor planning of the task. This step-wise improvement was not only persistent in post-training retests but was also apparently implicit and subject to further incremental improvements in movement strategy over the period of 24\u2009hours. The rapid change in motor strategy was accompanied by a transient within-session increase in spatial error for the observation groups, but this went away by 24\u2009h post-training. We suggest that observation of hand movements of an expert model coaligned with self-produced movements during training can significantly condense the time-course of ecologically relevant drawing\/writing skill mastery.<\/jats:p>","DOI":"10.1038\/s41598-019-40924-9","type":"journal-article","created":{"date-parts":[[2019,3,14]],"date-time":"2019-03-14T12:06:06Z","timestamp":1552565166000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Observation of an expert model induces a skilled movement coordination pattern in a single session of intermittent practice"],"prefix":"10.1038","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8845-5082","authenticated-orcid":false,"given":"Jason","family":"Friedman","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1895-0189","authenticated-orcid":false,"given":"Maria","family":"Korman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2019,3,14]]},"reference":[{"key":"40924_CR1","unstructured":"Bandura, A. 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