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Data, Research & Publications  >  Baseline Normative Data
  Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT)  (contd.)

Normative Table 8: High School Boys Ages 16 - 18 (N = 158)


Norms for High School Girls Ages 14 - 18 (N = 83)

Table 9. Approximate Classification Ranges for Index Scores: Girls Ages 14 - 18

  Verbal Memory Visual Memory Processing Speed Reaction Time
Impaired < 68 < 49 < 18.9 > .75
Borderline 69 - 77 50 - 59 19.0 - 28.9 .74 - .67
Low Average 78 - 83 60 - 69 29.0 - 32.7 .66 - .61
Average 84 - 93 70 - 88 32.8 - 42.3 .60 - .51
High Average 94 - 98 89 - 92 42.4 - 47.0 .50 - .49
Superior 99 - 100 93 - 98 47.1 - 51.1 .48 - .45
Very Superior -- 99 - 100 > 51.2 < .44


Cutoff scores for the 10th percentile and the 2nd percentiles for 11 scores derived from the 6 subtests are provided in Table 10. This table allows you to identify unusually and abnormally low subtest scores.

Table 10. Cutoff Scores for Specific Subtests: High School Girls Ages 14 - 18


Subtests Score		 Unusually Low
(< 10th Percentile)		 Impaired
(< 2nd Percentile)
Word Memory - Learning Percent Correct < 91% < 87%
Word Memory - Delayed Memory Percent Correct < 82% < 78%
Design Memory - Learning Percent Correct < 66% < 54%
Design Memory - Delayed Memory Percent Correct < 57% < 50%
X's and O's - Total Correct (Memory) < 5 < 3
X's and O's - Avg. Correct RT (Interference) > .49 > .59
Symbol Match - Total Correct (Symbols) < 25 < 23
Symbol Match - Avg. Correct RT (Symbols) > 1.69 > 1.96
Color Match - Avg. Correct RT > .96 > 1.18
Three Letters - Percent of Total Letters Correct < 80% < 67%
Three Letters - Avg. Counted Correctly < 9.1 0

Normative Table 11: Girls Ages 14 - 18 (N = 83)



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Normative Data for Children Ages 11-14

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