@article{ref1,
title="Concussion in contact sports: reliable change indices of impairment and recovery",
journal="Journal of clinical and experimental neuropsychology",
year="1999",
author="Hinton-Bayre, A. D. and Geffen, G. M. and Geffen, L. B. and McFarland, K. A. and Friis, P.",
volume="21",
number="1",
pages="70-86",
abstract="This paper reports a follow-up study to an article on the sensitivity of three tests of speed of information processing to impairment after concussion (Hinton-Bayre, Geffen, & McFarland, 1997). Group analyses showed that practice effects can obscure the effects of concussion on information processing, thereby making the assessment of functional impairment and recovery after injury unreliable. A Reliable Change Index (RCI) was used to assess individual variations following concussion. It was found that 16 of the 20 concussed professional rugby league players were impaired 1-3 days following injury. It was also demonstrated that 7 players still displayed cognitive deficits at 1-2 weeks, before returning to preseason levels at 3-5 weeks. The RCI permits comparisons between different tests, players, and repeated assessments, thereby providing a quantitative basis for decisions regarding return to play.<p /><p>Language: en</p>",
language="en",
issn="1380-3395",
doi="",
url="http://dx.doi.org/"
}