Table 2: Neurocognitive tests used and assessment time-points of the studies.

First author (year) Cognitive tests Assessment times
Baillargeon, et al. (2012) [5] Symbol digit modalities test, hopkins verbal learning test-revised, brief visuospatial memory test-revised, colour trails, Pennsylvania state University cancellation task (PSU), brown-peterson test and controlled oral word association test One year post injury
Maugans, et al. (2012) [21] IMPACT: Word memory, X's and O's, design memory, symbol matching, color match, three letter memory 72 hours or less, 14 days and 30+ days post injury
McCrea, et al. (2010) [22] ANAM: coding substitution delayed; coding substitution learning; mathematical processing; matching to sample; simple reaction time Day of injury; 8 and 45 days post injury
Covassin, et al. (2010) [18] IMPACT: Word memory, X's and O's, design memory, symbol matching, color match, three letter memory 2, 7, 14, 21 and 30 days post injury
Colvin, et al. (2009) [33] IMPACT: Word memory, X's and O's, design memory, symbol matching, color match, three letter memory 13.3 days post injury for males and 12 days post injury for females
Shuttleworth-Edwards, et al. (2008) [24] Digit span forwards and backwards, trail making test A & B, IMPACT 3.0 (verbal and visual memory and visual motor speed) 7 months post injury
Fazio, et al. (2007) [20] IMPACT: Word memory, X's and O's, design memory, symbol matching, color match, three letter memory 7 days post injury
Ellemberg, et al. (2007) [19] California verbal learning task, Ruff 2 & 7 selective attention task, brief test of attention, symbol digits modalities test, Stroop, tower of London-Drexel version, letter fluency test, forward and backward digit span, simple reaction time, choice reaction time 6-8 months post injury

Note: ANAM: Automated Neuropsychological Assessment Metrics; IMPACT: Immediate Post-Concussion Assessment and Cognitive Testing.