How families can help without constantly testing someone's memory

Most of us learn by trial and error. We guess, find out we were wrong, and remember the right answer next time. That last step leans on explicit memory, the kind you use to consciously recall a fact or an event.

In a 1994 study, memory researchers Alan Baddeley and Barbara Wilson proposed that a main job of explicit memory is to weed out mistakes made during learning [1]. People with amnesia (severe memory loss) often keep much of their implicit memory, the automatic kind that builds habits and a sense of familiarity. Implicit memory is weak at sorting right answers from wrong ones, so a mistaken guess can get learned along with everything else [4]. In their experiments, errorless learning, a teaching method that prevents mistakes while someone learns, helped. It helped the group with amnesia most [1].

Later work tested the idea in people whose memory loss came from an acquired brain injury. A 2000 report pulled together three studies with 10 experiments [5]. People with more severe memory loss gained the most from errorless methods. The benefit showed up on tasks that draw on implicit memory. It did not show up on tasks that need conscious recall of new links, such as learning a route [5]. The advantage may also hold only when the gap between learning and recall is fairly short [5]. Researchers still debate exactly why the method works [4].

INCOG 2.0, a set of international recommendations on memory care after TBI released in 2023, advises teaching methods that limit errors, such as errorless learning and spaced retrieval [6]. It also calls for plenty of practice time, spread out over time [6]. Therapists use these tools in planned sessions.

At home, a surprise quiz invites guessing. If your loved one guesses wrong out loud and then gets corrected, the wrong answer gets one more rehearsal. Most of these studies involved people with moderate to severe memory loss. So the effect after a mild concussion is less clear.

Practice can still help when it is set up well. The same guideline says retrieval practice and other mental strategies may work best for people whose memory problems are mild or moderate [6]. In therapy, the practice is planned so the person mostly succeeds. If you want to help with practice at home, ask the therapist to show you how.

Teaching a new routine at home

Sometimes the family does need to help someone learn something new, like a different bus route or a new phone app. The INCOG 2.0 advice translates into a few home habits [6]:

1. Break the task into small steps and write them down as a checklist [6, 7].
2. Show each step first, then do it together, before asking the person to try alone.
3. If they pause, give the next step right away so a guess never gets the chance to settle in.
4. Practice a little on several days instead of one long session [6].
5. Hand over one step at a time as each becomes automatic.