ImPACT® Test Section 4:
Graphic Display of ImPACT Test Scores

There are five ImPACT test scores calculated from the neuropsychological tests administered, and each is displayed graphically:

The Verbal Memory Composite score is comprised of the average of the following scores:

1. Total memory percent correct
2. Symbol match - total correct hidden symbols
3. Three letters - total percent of total letters correct

A higher score indicates better performance on the Verbal Memory Composite.

The Visual Memory Composite score is comprised of the average of the following scores:

1. Design memory - total percent correct score
2. X's and O's - total correct memory score

A higher score indicates better performance on the Visual Memory Composite.

The Processing Speed Composite score is comprised of the average of the following scores:

1. X's and O's-total correct (interference)/4
2. Three-letters-Average counted correctly*3

A higher score indicates better performance on the Processing Speed Composite.

The Reaction Time Composite score is comprised of the average of the following scores:

1. X's and O's - average correct RT (interference)
Symbol match - average correct RT/3
Color match - average correct RT

A lower score indicates better performance on the Reaction Time Composite.

The Impulse Control Composite score is comprised of the total of the following scores:

1. X's and O's - total incorrect-interference
2. Color match - total commissions

A lower score indicates better performance on the Impulse control composite.

A large number on this composite index (>20) typically indicates errors in the approach to the test, such as misinterpreted directions or a careless response style. A close perusal of the individual raw data is indicated when this scale is elevated.

The Total Symptom Composite score represents the total for all 22 symptom descriptors. A lower score indicates fewer endorsed symptoms by the athlete.

This series of graphs allows direct comparison of test performance in these core areas across multiple testing sessions. The composite scores were constructed to provide summary information regarding different broad cognitive domains. Thus far, our studies have indicated that the verbal memory, visual memory, processing speed, reaction time and symptom scores accurately discriminate concussed from non-injured athletes.

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