Table 1.

Subtests and Composite Scores and Validity Indicators for the ImPACT Test (Online Version)^a

	Neurocognitive Domain Measured	Contributing Scores/Formula (Average of Scores Presented)
Test name
Word Memory	Word recognition memory (learning and retention)
Design Memory	Design recognition memory (learning and retention)
X's and O's	Visual working memory and cognitive speed
Symbol Match	Memory and visual motor speed
Color Match	Impulse inhibition and visual motor speed
Three Letter Memory	Verbal working memory and cognitive speed
Composites (online)
Verbal Memory		Word Memory (hits, correct distractors, immediate and delayed)/48
		Symbol Match (total correct hidden)/9
		Three Letter Memory (total letters correct)/15
Visual Memory		Design Memory (hits, correct distractors, immediate and delayed)/48
		X's and O's (total correct memory)/12
Visual Motor		X's and O's (total correct)/4
Speed		Three Letter Memory (average correctly counted)/3
Reaction Time		X's and O's (average counted correct reaction time)
		Symbol Match (average weighted reaction time for correct responses)
		Color Match (average reaction time for correct response)
Impulse Control		X's and O's (number of incorrect distracters)
		Color Match (number of commission errors)
Symptom Scale	Rating of individual self-reported symptoms

^aInvalidity indicators for ImPACT baseline testing (online version; ImPACT Applications, Inc, Pittsburgh, PA): Impulse Control Composite Score > 30; Word Memory Learning percentage < 69%; Design Memory Learning percentage < 50%; X's and O's Total Correct Interference > 30; and Three-Letter Memory Total Letters Correct < 8.