Baseline concussion testing is a series of brain function and physical assessments taken before an athlete’s season begins, while they’re healthy. The results create a personal snapshot of how your brain normally works, so if you later get a concussion, a clinician can compare your post-injury scores to your pre-injury scores and gauge how much the concussion has affected you. It’s widely used in youth, high school, college, and professional sports as a core part of concussion management.
What the Testing Actually Measures
A comprehensive baseline assessment isn’t a single test. It evaluates several different brain and body functions, giving clinicians a multi-angle view of your normal performance. The standard components include:
- Symptoms: A checklist where you report any existing issues like headaches, difficulty concentrating, or dizziness. This matters because some athletes already have these symptoms before any injury, and clinicians need to know that.
- Cognitive function: Tasks that measure verbal and visual memory, processing speed, and reaction time. These are the areas most commonly disrupted by a concussion.
- Balance: A clinical balance assessment that counts errors while you hold different stances. The Balance Error Scoring System (BESS) is one of the most common tools for this.
- Vestibular and eye movement function: A screening called the Vestibular/Ocular Motor Screening (VOMS) evaluates how well your eyes track moving objects, how your inner ear coordinates with eye movement, and whether visual motion triggers symptoms. It also measures your near point of convergence, which is how close an object can get to your face before you see double.
Together, these domains give clinicians far more information than any single test could. A concussion might impair your balance but leave your memory intact, or slow your reaction time without affecting your eye tracking. The multimodal approach catches deficits that a single-domain test would miss.
Common Testing Tools
The most widely used computerized tool is ImPACT (Immediate Post-Concussion Assessment and Cognitive Testing), which generates four composite scores: verbal memory, visual memory, visual motor speed, and reaction time. It’s available in a standard version for athletes 13 and older, and a pediatric version approved by the FDA for children as young as five.
On the sideline and in the clinic, healthcare professionals use the SCAT6 (Sport Concussion Assessment Tool 6), the latest standardized evaluation developed through the 2022 Amsterdam International Consensus Conference on Concussion in Sport. The SCAT6 is designed for adolescents and adults ages 13 and up, while the Child SCAT6 covers ages 8 to 12. For more detailed office-based follow-up, the SCOAT6 (Sport Concussion Office Assessment Tool 6) guides clinicians through a broader evaluation and management process.
How Baseline Scores Are Used After a Concussion
When an athlete gets a concussion, they retake the same tests. Clinicians then compare post-injury results to the baseline, looking for statistically meaningful declines rather than just any change. This distinction is important. Normal test-retest variability means your scores will fluctuate slightly every time you take a test, even when you’re perfectly healthy. To account for this, tools like ImPACT use what are called reliable change criteria, which are statistical thresholds that help clinicians distinguish a genuine deficit from normal score fluctuation.
If post-injury scores fall below those thresholds on one or more composites, the athlete is considered to still be experiencing cognitive effects from the concussion. Recovery is tracked through repeated testing until scores return to baseline levels. Clearance to return to contact activities typically follows a graduated protocol, where passing the cognitive tests is one step among several that also includes physical exertion without symptoms.
Why Individual Baselines Matter
You might wonder why clinicians can’t just compare an injured athlete’s scores to population averages for their age and sex. The reason is that people vary widely in their normal cognitive function. Factors like learning disabilities, attention disorders, history of prior concussions, anxiety, depression, and even migraine history all influence baseline cognitive scores. A study in the Journal of Athletic Training found that these preexisting factors meaningfully affected baseline neurocognitive results, which means using a generic average could make a concussion look less severe than it is, or flag someone as impaired when they’re actually at their personal normal.
How Often to Update Your Baseline
Baselines don’t last forever. Most components of the assessment should be repeated annually to stay accurate. Computerized cognitive testing specifically can be updated every two years for most athletes, though more frequent retesting is recommended if the athlete has sustained a concussion since the last baseline or has a medical condition that could shift their cognitive performance. For young athletes whose brains are still developing, annual updates are especially important because their “normal” is a moving target.
Reliability Limitations
Baseline testing is a useful clinical tool, but it’s not perfect. A study of 117 high school football and soccer players found that the test-retest reliability of computerized neurocognitive testing over one year ranged from low to marginal, depending on the specific task. The best-performing measure (identification speed) had moderate reliability, while the worst-performing measure (a learning accuracy task) had low reliability. This is one reason clinicians use baseline testing as just one piece of a broader assessment rather than relying on cognitive scores alone to make return-to-play decisions.
Testing conditions also matter. Baseline assessments done in noisy gyms with groups of distracted teenagers will produce less reliable results than testing done in a quiet, controlled setting. If the testing environment is chaotic, the scores may not actually reflect the athlete’s true cognitive abilities.
The Sandbagging Problem
Some athletes deliberately perform poorly on their baseline test, a practice called sandbagging. The logic is simple: if your baseline scores are artificially low, it’s easier to “pass” the post-injury test and get back on the field faster. Research suggests that up to 30% of athletes voluntarily underperform on computerized cognitive testing.
Most testing platforms have built-in validity indicators that reliably catch the majority of sandbagging attempts. Newer approaches are also being developed, including eye-tracking technology that monitors the actual movement patterns of an athlete’s eyes during testing. Deliberate underperformance produces distinct patterns, like abnormally long pauses between eye movements and an unusual number of wrong-direction eye movements, that are difficult to fake naturally. If a baseline test is flagged as invalid, the athlete is typically asked to retake it.
Cost and Access
Baseline concussion testing is generally affordable but comes out of your own pocket. A typical ImPACT baseline test costs around $30, and health insurance does not cover it since it’s considered preventive rather than diagnostic. Many schools, sports leagues, and athletic training programs offer group testing sessions before the season starts, which keeps costs low and makes it easy to get large rosters tested at once. Some pediatric sports medicine clinics offer more comprehensive baseline evaluations that include balance and vestibular screening alongside the cognitive test, which may cost more but provide a fuller picture.