Posts Tagged ‘Bjorn Rasch’

How to Hack Your Unconscious…to Boost Your Memory and Learn Better

August 5, 2018

This post is based on a feature article with the same title as this post by Emma Young in the 28 July 2018 issue of the New Scientist. Much of the learning process goes on deep in the mind. If you could improve the unconscious processing and retrieval of memories, you could game the system. Here are the top tips to improve how you recall facts.

If you’re learning facts such as foreign phrases or historical dates, giving our study a boost could be as simple as taking a break. Lila Davachi of New York University found that breaks help to consolidate memories, improving recall later. But for a time out to work, brain cells different to those used during the learning period need to be activated. So, try not to think about what you have just been working on.

It is even better to sleep on it. It is well established that the brain processes memories during sleep, but it will do this more effectively if you leave the optimum time between learning and sleeping. Christoph Nissen at the University of Bern found that a group of 16 and 17 year olds performed best on tests of factual memory if they studied the material mid-afternoon, but they acquired skills involving movements faster if they practiced in the evening. So it appears that the “critical window” between learning and sleep is shorter for movement-related learning that for other types of memory. It isn’t clear whether adults can benefit as much as teenagers from these windows. Nissan says, “There is evidence that adolescents have a higher capacity to learn—and they sleep better.” Moreover, after about age 60 adults generally learn better in the morning.

Bjorn Rasch of the University of Fribourg, Switzerland is investigating another way to boost learning during sleep. He has conducted studies showing that adult language learners remember more when played recordings of foreign words while sleeping. He says, “The literature on targeted memory reactivation is growing rapidly. Most findings are positive.” But it is important that the words are played during non-REM, slow-wave sleep, when factual memories are consolidated. And the volume of the recordings should not be so loud that it disrupts. You could also try using scents to cue learning in sleeping brain. Rasch has found a boost to memory in people who smelled roses while learning a task and then again during slow wave sleep.

Perhaps the most surprising effect is the placebo effect. Yes, there is a placebo effect in memory. In this study volunteers who had to answer multiple-choice questions did significantly better if told that the correct answer would be flashed subliminally just before the question. They were not. The improved performance was all the result of the placebo effect. The researchers think it worked by reducing performance anxiety and priming people for success. However, HM still wants to find successful replications of this experiment.

HM would be remiss if he did not mention that there is an entire category of posts titled Mnemonic Techniques. Included here are classical techniques and techniques develop for remembering numbers. There are also posts here titled “Moonwalking with Einstein,” and “How to Become a Memory Grandmaster’ that describe what can be done with these techniques as well as professional memory competitions.