Although the convergent validity of ImPACT was supported , evidence of discriminant and predictive validity , diagnostic accuracy and responsiveness was inconclusive .
The review found many factors influenced the validity and utility of ImPACT scores .
Background The immediate post concussion assessment and cognitive testing ( ImPACT ) is the most widely used concussion assessment tool .
Despite its popularity , it is unclear if validation studies for the ImPACT test covered all aspects of validity to support its widespread use in research and clinical practice .
Objective The purpose of this report is to review literature surrounding the validity and the utility of the ImPACT test .
Test-retest reliability of four computerized neurocognitive assessment tools in an active duty military population.
Computerized neurocognitive assessment tools ( NCATs ) are increasingly used for baseline and post-concussion assessment s. To date , NCATs have not demonstrated strong test-retest reliabilities . Most studies have used non-military population s and different method ologies , complicating the determination of the utility of NCATs in military population s. The test-retest reliability of four NCATs ( Automated Neuropsychological Assessment Metrics 4 [ ANAM4 ]  ,  CNS-Vital Signs , CogState  , and Immediate Post-Concussion Assessment and Cognitive Test [ ImPACT ] ) was investigated in a healthy active duty military sample . Four hundred and nineteen Service Members were r and omly assigned to take one NCAT and 215 returned after approximately 30 days for retest . Participants deemed to have inadequate effort during one or both testing sessions , according to the NCATs scoring algorithms , were removed from analyses . Each NCAT had at least one reliability score ( intraclass correlation ) in the " adequate " range ( .70-.79 ) , only ImPACT had one score considered " high " ( .80-.89 ) , and no scores met " very high " criteria ( .90-.99 ) . However , overall test-retest reliabilities in four NCATs in a military sample are consistent with reliabilities reported in the literature and are lower than desired for clinical decision-making
Although the convergent validity of ImPACT was supported , evidence of discriminant and predictive validity , diagnostic accuracy and responsiveness was inconclusive .
The review found many factors influenced the validity and utility of ImPACT scores .
Background The immediate post concussion assessment and cognitive testing ( ImPACT ) is the most widely used concussion assessment tool .
Despite its popularity , it is unclear if validation studies for the ImPACT test covered all aspects of validity to support its widespread use in research and clinical practice .
Objective The purpose of this report is to review literature surrounding the validity and the utility of the ImPACT test .