Table 1.

ImPACT Modules and Composite Scores

Module	Cognitive Domain Evaluated
Word memory	Attentional processes, verbal recognition memory
Design memory	Attentional processes, visual recognition memory
X's and O's	Visual working memory, visual processing speed, and visual memory
Symbol match	Visual processing speed, learning, and memory
Color match	Impulse control, response inhibition
3 letters	Working memory and visual-motor response speed
Composite score	Module(s) averaged
Verbal memory	Word memory, symbol match, and 3 letters (percentage correct)
Visual memory	Design memory (total percentage correct score) and X's and O's (total correct memory score)
Visual motor (processing) speed	X's and O's (total number correct: 4 during interference) and 3 letters (average counted correctly × 3 from countdown phase)
Reaction time	X's and O's (average correct reaction time of interference stage), symbol match (average correct reaction time/3) and color match (average correct reaction time)
Impulse control	X's and O's (total errors on the interference phase) and color match (total commissions)
Total symptom	Total for all 22-symptom descriptors (ie, headache, vomiting, dizziness). A complete list of symptoms can be found in the ImPACT clinical interpretation manual.3

Abbreviation: ImPACT, Immediate Post-Concussion Assessment and Cognitive Testing.