How can I tell whether my memory is improving?
Track daily memory, make sense of test scores and know when to get rechecked
Some days you feel almost like yourself. Then you leave the stove on, miss a call you promised to return, and wonder whether anything has changed since the crash.
After a brain injury of any severity, “Am I getting better?” is one of the hardest questions to answer on your own. You notice every slip. The things that went fine slide by without a thought.
There are fairer ways to judge. You can watch a few everyday tasks, keep a short log, read test scores with the right caution, and agree on clear goals with your care team. You can also learn which changes mean you should be checked again.
Why progress is hard to see from the inside
Most people do recover from a concussion. The Centers for Disease Control and Prevention (CDC) says most people with a mild traumatic brain injury (TBI) or concussion feel better within about two weeks [1]. The Living Concussion Guidelines, a Canadian adult guideline kept current as new studies come out, say most patients recover fully, including their thinking, within about a month [2].
That same guideline notes that a smaller group, about 20 to 30%, have symptoms that last longer [2]. After a moderate or severe TBI, memory problems are more likely to be lasting and to affect daily life [3]. So the timeline you should expect depends on how serious your injury was.
Memory is judged by its misses
Memory works in the background. When it works, you do not notice. When it fails, you feel it right away. One bad moment can color a whole week.
Other problems also blur the picture. The Living Concussion Guidelines say thinking problems that last are often caused or made worse by other conditions, including poor sleep, fatigue and pain [2]. On a tired day, your memory may seem worse even if the healing underneath has moved forward.
Forgetting to do things matters most
For many people, the most upsetting slips involve remembering to do something later, like taking a pill or calling back. Researchers call this prospective memory, which means remembering to carry out a plan at a future time [4]. A 2018 review of studies in people with acquired brain injury found that problems with this kind of memory are a strong signal of trouble in daily life [5]. That makes missed tasks a useful thing to track.
Everyday signs that tell you more than a score
The earlier third edition of the Ontario adult concussion guideline asks clinicians to look at how thinking problems affect work or school and tasks at home and in the community [6]. You can use the same lens. Pick a few tasks that matter to you and watch how they go over time.
Useful everyday markers include:
- How often you miss an appointment, a bill or a promised call.
- How often family members say, “You already asked me that.”
- How long it takes to find your keys, phone or wallet.
- Whether you can follow a TV show or a meeting without losing the thread.
- How many times you need to reread a page or an email.
- How much prompting you need from other people to get through the day.
So a fair sign of progress is missing fewer things while you keep using your system. Plenty of people with no injury at all run their lives from a calendar.
Comparison compiled by Safety Behind the Wheel Foundation
Ways to measure memory change after a brain injury
| Measure | What it can show | What to watch for |
|---|---|---|
| Daily log of missed tasks | Real changes in everyday life | Busy or tiring weeks can skew it |
| Symptom questionnaire, such as the Rivermead | How symptoms change over weeks | It reflects how you feel |
| Goals set with your care team | Progress on what matters to you | Goals must be clear at the start |
| Repeated thinking tests | Change in specific skills | Scores can rise just from practice |
| Brain game or app scores | Skill at that game | Gains may not carry over to daily tasks |
| Family reports | What others notice at home | Can differ from your own view |
Sources: Ontario concussion guideline, 3rd edition [6]; Living Concussion Guidelines [2]; goal scaling study [8]; practice effect study [9]; VA/DoD guideline [10]; prospective memory trial [4].
What test scores and brain games can and cannot show
Test scores feel objective, so it is natural to trust them. They do have limits that are worth knowing before you compare one result with another.
The practice effect
When you take the same test twice, you often do better the second time because you know what to expect. This is called the practice effect. In one study, 40 healthy college age volunteers with no injury took a computerized concussion test three times, about a week apart. They scored higher on 6 of 9 areas at a later session. Most of the gain came between the first and second tries [9].
The authors suggested using reliable change indices, a statistical check of whether a change is bigger than normal test to test variation [9]. A study of 200 youth hockey players aged 11 to 18 used different versions of the test for each session to limit practice effects. It also found that younger players’ scores varied more from one test to the next [11]. Both studies involved uninjured people, so they show how much scores can move even without any change in the brain.
What the guidelines say about routine testing
The Veterans Affairs and Defense departments issued a joint mild TBI guideline, known as VA/DoD, in 2021. It suggests against computer based concussion test batteries as a routine part of diagnosis and care. It also suggests against a complete neuropsychological workup, meaning a long series of thinking tests given by a psychologist, in the first 30 days [10]. Testing still has a place later. A full assessment can help clarify treatment options and set goals [2].
Brain game scores
Apps that track your score can be motivating. The VA/DoD guideline suggests against relying on programs people run on their own as a form of cognitive rehabilitation [10]. The INCOG 2.0 guidelines, a 2023 international set of memory rehabilitation advice for TBI, say any computer based training should happen with a therapist guiding it [3]. A higher game score shows you got better at that game. Whether it helps you remember appointments is a separate question.
When tests and real life disagree
A randomized trial of 45 adults with moderate to severe TBI tested training in memory strategies such as using a diary. Scores on a prospective memory test went up, and so did diary use in daily life. But relatives’ ratings of everyday memory failures did not change significantly, a reminder to use more than one measure [4].
How tiredness, sleep and mood make memory swing
Fatigue is common after concussion. According to the fatigue section of the Living Concussion Guidelines, 27.8% of people still have persistent fatigue 3 months after the injury [12]. The same guideline notes that tiredness can feel far bigger than the effort behind it, and can even show up with no effort at all [12].
That matters when you judge your memory. A slip at 4 p.m. after a long day of errands may say more about your energy than about your recovery. Pain, poor sleep and low mood can drag thinking down too [2].
Compare like with like
To read your own pattern fairly, compare similar days. Check yourself at roughly the same time of day, after similar sleep, and in similar weeks. A Monday morning after a good night is a poor match for a Friday evening after a hard week.
The guideline on fatigue suggests spreading activities and breaks across the day, and using a notebook or diary for planning and recording your activities. Keeping that kind of record can also help you spot patterns in your fatigue and what feeds it [12].
A composite example
Imagine a 42 year old delivery driver, injured in a rear end crash, who feels her memory is “going backward.” Her log shows that most missed tasks fall on days after poor sleep or long shifts. On rested days, she misses fewer tasks than she did two months ago. That pattern is worth sharing with her care team, because it points to sleep and pacing as things to work on.
Setting goals you can measure with your care team
A clear goal gives you something firm to measure against. Rehabilitation teams may help people write goals in a SMART format, meaning specific, measurable, achievable, realistic and timed [8]. The INCOG 2.0 guidelines favor goals tied to what the person needs to do day to day [3].
Goal attainment scaling
One method some rehabilitation teams use is goal attainment scaling. You and your team agree on the result you expect by a certain date, and that result is scored as 0. Doing a little or a lot better than expected scores plus 1 or plus 2. Doing a little or a lot worse scores minus 1 or minus 2 [8].
One study followed 164 adults in a UK inpatient rehabilitation unit after acquired brain injury. Most had had a stroke. Another 18% had a traumatic injury. Goal scaling picked up gains that a standard disability scale missed [8]. The study took place in one center, so its results may not apply everywhere [8].
What a goal might look like
Here is a sample goal, written as a ladder:
- Minus 2: I miss three or more medical appointments in the next month.
- Minus 1: I miss two appointments.
- 0: I miss no more than one appointment, using my phone calendar.
- Plus 1: I miss none. I enter every new appointment the same day.
- Plus 2: I miss none. I also remind my partner of hers.
A goal like this measures something you care about. It also counts success with tools, since the phone calendar is part of the plan.
A simple way to track your memory each week
You do not need a complicated system. The CDC encourages adults with a mild TBI or concussion to log their symptoms and bring that record to their doctor [13]. A short daily note and a weekly look back are enough for most people.
That third edition names the Rivermead Post Concussion Symptoms Questionnaire as one validated symptom form for assessing and tracking symptoms [6]. The Living Concussion Guidelines say forms like this can be used for ongoing monitoring [2]. Ask your care team which form they use, so your numbers line up with theirs.
What to write down each day
Keep it to two minutes. A notebook, a phone note or a printed sheet all work.
Checklist from Safety Behind the Wheel Foundation
- Date, hours slept and a 0 to 10 rating for tiredness.
- Tasks you meant to do and whether each got done.
- Memory slips, with the time of day and what was going on.
- Times you needed a reminder from someone else.
- Pain, stress or low mood, if they were part of the day.
- One thing that went well.
Review once a week
At the end of each week, count missed tasks and slips, and note the average sleep and tiredness. Every four weeks, compare the totals with the month before. Using a checklist to mark what you have done is a simple habit the MSKTC recommends [7]. Bring a short summary to appointments, since a few lines are easier to discuss than pages of notes.
When a change needs a recheck
Recovery has ups and downs, but some changes should be checked. The CDC advises adults to tell their doctor if they do not think they are getting better or if symptoms are getting worse [13]. Some symptoms may not show up for hours or days after the injury [1].
The Living Concussion Guidelines suggest that referral for a specialized thinking assessment may be considered when several things are true. These are thinking problems that limit daily life, other conditions that affect thinking already treated as well as possible, no ongoing improvement, and symptoms that have lasted beyond 4 weeks [2]. The fatigue section suggests considering referral to a concussion clinic team if fatigue lasts more than a month [12].
Newer U.S. guidance from 2025, written for adult TBI care in primary care, uses a similar one month mark. For problems such as forgetfulness, poor concentration or slowed thinking that persist past a month, it says clinicians may offer a formal neuropsychological assessment [14].
Sometimes a symptom appears for the first time more than 30 days after a mild TBI. For that case, the VA/DoD guideline suggests an evaluation focused on the symptom that looks for causes other than the brain injury [10]. When memory, attention or planning stay a problem after other causes are handled, the guideline favors a brief course of clinician led cognitive rehabilitation [10].
Driving and other high stakes tasks
If memory or attention problems affect your daily life, ask whether they could affect your driving. The CDC suggests checking with your doctor about when it is safe to get back to activities such as driving [13]. Your state may have its own rules for drivers with medical conditions, so find out what it expects before you get back behind the wheel.
Get emergency care right away
After a blow to the head or body, any of these danger signs means you should call 911 or head to the emergency room right away [1]:
- A headache that grows steadily worse and will not ease.
- Weakness, numbness, decreased coordination, convulsions or seizures.
- Repeated vomiting.
- Slurred speech or unusual behavior.
- Unequal pupils, where one black center of the eye looks bigger than the other.
- Confusion, restlessness or agitation, or not knowing familiar people or places.
- Passing out, unusual sleepiness, or being impossible to wake.
For a child, also get emergency care if the child will not stop crying and cannot be comforted, or will not nurse or eat [1].
Questions to ask your care team
Question checklist from Safety Behind the Wheel Foundation
- Based on my injury, how long should I expect it to take before my memory improves?
- Which everyday tasks should I track to see whether I am getting better?
- Which symptom questionnaire do you use, and how often should I fill it out?
- If I take a thinking test again, how will you account for the practice effect?
- Could my sleep, pain, mood or medicines be making my memory worse?
- Can we set one or two goals together and decide how we will score them?
- At what point would you refer me for a full neuropsychological assessment?
- Which new or worsening symptoms should make me call you right away?
- Is my memory or attention good enough for driving, and who should check that?
Frequently asked questions
How long should I track before deciding whether I am improving?
Give it several weeks so that good and bad days even out. The Living Concussion Guidelines use 4 weeks as one point at which a specialized thinking assessment may be considered, if problems still limit daily life and are not improving [2].
Is it a bad sign that I still need notes and phone reminders?
No. Guidelines include self directed memory strategies, such as notes and phone reminders, among the ways to manage thinking problems after concussion [2]. The MSKTC says writing things down does not weaken memory and may help it [7].
If my test score goes up, is my memory better?
Maybe, but not necessarily. Healthy people often score higher on a repeat test because the test is familiar, so clinicians use statistical checks to judge whether a change is real [9]. Pair the score with what you see in daily life.
The bottom line
Recommendation from Safety Behind the Wheel Foundation
The most honest measure of memory is how your days go. Track a few tasks that matter, note your sleep and fatigue, and judge the trend over weeks. Treat test and game scores as one piece of the picture, and set clear goals with your care team so you both know what progress looks like.
If things are not improving, or you notice something new or worse, tell your care team. If you see any danger sign, call 911.
Sources and further reading
- 1Centers for Disease Control and Prevention. Symptoms of mild TBI and concussion. Last reviewed September 2025. cdc.gov/…/index.html
- 2Living Concussion Guidelines. Guideline for concussion and prolonged symptoms for adults 18 years of age or older: Cognitive difficulties. Updated May 2023. concussionsontario.org/…/cognitive-difficulties
- 3Velikonja D, Ponsford J, Janzen S, et al. INCOG 2.0 guidelines for cognitive rehabilitation following traumatic brain injury, part V: memory. Journal of Head Trauma Rehabilitation. 2023;38(1):83-102. doi.org/10.1097/HTR.0000000000000837
- 4Shum D, Fleming J, Gill H, Gullo MJ, Strong J. A randomized controlled trial of prospective memory rehabilitation in adults with traumatic brain injury. J Rehabil Med. 2011;43(3). doi.org/10.2340/16501977-0647
- 5Raskin SA, Williams J, Aiken EM. A review of prospective memory in individuals with acquired brain injury. Preprint, Trinity College Digital Repository. 2018. core.ac.uk/download/232748304.pdf
- 6Concussions Ontario. Guideline for concussion/mTBI and prolonged symptoms, 3rd edition, for adults over 18 years: 9. Cognitive difficulties. Evidence current to 2017. concussionsontario.org/…/9._Cognitive_difficulties_.…
- 7Hart T, Sander A. Memory and moderate to severe traumatic brain injury. Model Systems Knowledge Translation Center factsheet. June 2016. tbi.washington.edu/…/TBI-Memory_English_2018.pdf
- 8Turner-Stokes L, Williams H, Johnson J. Goal attainment scaling: does it provide added value as a person-centred measure for evaluation of outcome in neurorehabilitation following acquired brain injury? J Rehabil Med. 2009;41(7):528-535. doi.org/10.2340/16501977-0383
- 9Littleton AC, Register-Mihalik JK, Guskiewicz KM. Test-retest reliability of a computerized concussion test: CNS Vital Signs. Sports Health. 2015;7(5):443-447. pmc.ncbi.nlm.nih.gov/articles/PMC4547115
- 10Department of Veterans Affairs, Department of Defense. VA/DoD clinical practice guideline for the management and rehabilitation of post-acute mild traumatic brain injury, version 3.0. 2021. Summary at apps.asha.org/…/f28e156a-8117-ee11-8145-005…
- 11Womble MN, Reynolds E, Schatz P, Shah KM, Kontos AP. Test-retest reliability of computerized neurocognitive testing in youth ice hockey players. Arch Clin Neuropsychol. 2016;31(4):305-312. pmc.ncbi.nlm.nih.gov/articles/PMC4876934
- 12Living Concussion Guidelines. Guideline for concussion and prolonged symptoms for adults 18 years of age or older: Fatigue. Updated May 2023. concussionsontario.org/…/fatigue
- 13Centers for Disease Control and Prevention. Mild traumatic brain injury and concussion: information for adults. cdc.gov/…/TBI_Patient_Instructions-a.…
- 14Silverberg ND, Lee K, Mikolić A, et al. Action Collaborative on Traumatic Brain Injury Care: adapted clinical practice guideline. Annals of Family Medicine. 2025;23(6):552-569. doi.org/10.1370/afm.250352
This article reflects the safety priorities of brain injury recovery and road safety education. It is general education and is not medical advice for any one person. Guidelines and research change, so check official sources such as the CDC and talk with your own care team about your symptoms, your recovery and your readiness to drive. Reviewed October 2026.
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