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Performance of the Immediate Post-Concussion Assessment and Cognitive Testing Protocol Validity Indices.

L M Manderino1, J Gunstad1

  • 1Department of Psychological Sciences, Kent State University, Kent, OH, USA.

Archives of Clinical Neuropsychology : the Official Journal of the National Academy of Neuropsychologists
|November 1, 2017
PubMed
Summary
This summary is machine-generated.

This study found that improving validity indices in the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) can better identify athletes faking concussion symptoms. Enhanced indices help ensure accurate concussion diagnosis and safe return-to-play decisions.

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Area of Science:

  • Neuropsychology
  • Sports Medicine
  • Cognitive Assessment

Background:

  • Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) is a computerized tool used for concussion diagnosis in athletes.
  • Baseline ImPACT scores are crucial for comparing post-injury performance, but their accuracy depends on genuine effort.
  • Existing ImPACT validity indices aim to detect insufficient effort at baseline, but their effectiveness requires further examination.

Purpose of the Study:

  • To evaluate the classification accuracy and concurrent validity of current ImPACT validity indices.
  • To assess three proposed new indices for detecting insufficient effort during baseline ImPACT testing.
  • To improve the reliability of ImPACT for concussion management.

Main Methods:

  • Administered ImPACT, Word Memory Test (WMT), and MMPI-2-RF to 242 undergraduate students.
  • Participants were instructed to either exert full effort or simulate symptoms of severe repetitive concussion (SRC).
  • Analyzed the performance of existing and proposed ImPACT validity indices.

Main Results:

  • Adjusting score thresholds for existing ImPACT validity indices marginally improved sensitivity while maintaining high specificity (0.90).
  • Novel validity indices and alternative thresholds showed adequate specificity and improved overall sensitivity.
  • Provided positive and negative predictive powers for various validity indices.

Conclusions:

  • Current ImPACT indices may under-identify poor effort due to high specificity and lower sensitivity, potentially leading to premature return-to-play.
  • Proposed improvements and additions to ImPACT validity indices can enhance sensitivity while maintaining acceptable specificity.
  • Optimized validity indices are essential for protecting athletes and ensuring safe participation in sports.