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Sessions 1 and 2 were preceded with a \u201cstrong\u201d instruction to \u201creact as strongly as possible\u201d (Strong Reaction task). Sessions 3 and 4 were preceded with a \u201cspeed\u201d instruction to \u201creact as quickly as possible\u201d (Speed Reaction task). Lateral differences between magnitudes of forces developed by left and right thumbs and asynchrony between defined temporal parameters in bilateral force-time histories were significantly greater for Strong Reaction tasks. This departure from bilateral correlation observed between identical phases of isometric pushing action may suggest that participants' thumbs operate more independently under instructions that focus attention on force. Thus, specific instructions given to participants may have a profound effect on performance. It was also found that intermanual temporal differences for women were significantly smaller than for men, especially on Strong Reaction tasks. This phenomenon may be partly explained by a lower lateralization in women.<\/jats:p>","DOI":"10.2466\/pms.108.3.836-850","type":"journal-article","created":{"date-parts":[[2009,7,21]],"date-time":"2009-07-21T18:36:27Z","timestamp":1248201387000},"page":"836-850","source":"Crossref","is-referenced-by-count":1,"title":["Intermanual Temporal Differences in Bimanual Simple Isometric Coupling by Instructions"],"prefix":"10.1177","volume":"108","author":[{"given":"B.","family":"Gutnik","sequence":"first","affiliation":[{"name":"School of Health Science"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C. 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