{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,11]],"date-time":"2026-10-11T22:08:35Z","timestamp":1791756515318,"version":"4.3.4"},"reference-count":11,"publisher":"Human Kinetics","issue":"8","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,11,1]]},"abstract":"<jats:p><jats:italic><jats:bold>Context<\/jats:bold>:<\/jats:italic> Reaction time is commonly assessed postconcussion through a computerized neurocognitive battery. Although this measure is sensitive to postconcussion deficits, it is not clear if computerized reaction time reflects the dynamic reaction time necessary to compete effectively and safely during sporting activities. Functional reaction time assessments may be useful postconcussion, but reliability must be determined before clinical implementation. <jats:italic><jats:bold>Objective<\/jats:bold>:<\/jats:italic> To determine the test\u2013retest reliability of a functional reaction time assessment battery and to determine if reaction time improved between sessions. <jats:italic><jats:bold>Design<\/jats:bold>:<\/jats:italic> Cohort. <jats:italic><jats:bold>Setting<\/jats:bold>:<\/jats:italic> Laboratory. <jats:italic><jats:bold>Participants<\/jats:bold>:<\/jats:italic> Forty-one participants (21 men and 20 women) completed 2 time points. Participants, on average, were 22.5 (2.1)\u00a0years old, 72.5 (11.9)\u00a0cm tall, had a mass of 71.0 (13.7)\u00a0kg, and were mostly right leg and hand dominant (92.7%). <jats:italic><jats:bold>Interventions:<\/jats:bold><\/jats:italic> Participants completed 2 clinical reaction time tests (computerized Stroop and drop stick) and 5 functional reaction time tests (gait, jump landing, single-leg hop, anticipated cut, and unanticipated cut) across 2 sessions. Drop stick and functional reaction time assessments were performed in single (motor task only) and dual task (motor task with cognitive task). <jats:italic><jats:bold>Main Outcome Measures<\/jats:bold>:<\/jats:italic> Reaction time (in seconds) was calculated during all assessments. Test\u2013retest reliability was determined using 2-way mixed-effects intraclass correlation coefficients (3, <jats:italic>k<\/jats:italic>). Paired samples <jats:italic>t<\/jats:italic> tests compared mean reaction time between sessions. <jats:italic><jats:bold>Results<\/jats:bold>:<\/jats:italic> Test\u2013retest reliability was moderate to excellent for all reaction time outcomes (intraclass correlation coefficients [3, <jats:italic>k<\/jats:italic>] range\u2009=\u2009.766\u2013.925). Several statistically significant between-session mean differences were observed, but effect sizes were negligible to small (<jats:italic>d<\/jats:italic> range\u2009=\u20090.05\u20130.44). <jats:italic><jats:bold>Conclusions<\/jats:bold>:<\/jats:italic> The functional reaction time assessment battery displayed similar reliability to the standard computerized reaction time assessment battery and may provide important postinjury information, but more research is needed to determine clinical utility.<\/jats:p>","DOI":"10.1123\/jsr.2021-0021","type":"journal-article","created":{"date-parts":[[2021,5,5]],"date-time":"2021-05-05T07:26:33Z","timestamp":1620199593000},"page":"1237-1241","source":"Crossref","is-referenced-by-count":17,"title":["Test\u2013Retest Reliability of a Functional Reaction Time Assessment Battery"],"prefix":"10.1123","volume":"30","author":[{"given":"Robert C.","family":"Lynall","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rachel S.","family":"Johnson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Landon B.","family":"Lempke","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julianne D.","family":"Schmidt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"100","reference":[{"issue":"7","key":"r1","series-title":"Sports Med","doi-asserted-by":"publisher","first-page":"1341","DOI":"10.1007\/s40279-020-01281-0","article-title":"Examination of reaction time deficits following concussion: a systematic review and meta-analysis","volume":"50","author":"Lempke LB","year":"2020","unstructured":"Lempke LB, Howell DR, Eckner JT, Lynall RC. 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