Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Learning in your sleep – the right way

28.10.2015

You can swot up on vocabulary in your sleep – but only if you don’t confuse your brain in the process. Researchers funded by the Swiss National Science Foundation have invited people to their sleep lab for a Dutch language course.

You can’t learn new things in your sleep. Nevertheless, if you’ve been learning vocabulary in a foreign language, it can be highly effective to hear these words played over again while you sleep, as was already shown a year ago by researchers from the university of Zurich and Fribourg. Their new study, funded by the Swiss National Science Foundation, demonstrates that this only works if the brain can do its job undisturbed (*).

Translating doesn’t help

The researchers got 27 German-speaking test subjects to learn Dutch words, then let them sleep for three hours in the sleep lab. The scientists already knew that playing back this vocabulary softly would help the test subjects to remember the words. Now they wanted to give them more information while they were asleep.

The research team, led by biopsychologist Björn Rasch from the University of Fribourg, wanted to enhance the technique’s impact by supplying German translations after the Dutch words. They also wanted to achieve the opposite – in other words, they hoped that supplying incorrect translations would make the test subjects forget what they’d learnt.

“To our surprise, we were neither able to enhance their memory, nor able to make them forget what they’d learnt”, says Rasch. He was able to confirm the original findings – that simply cueing the Dutch vocabulary during sleep enabled the subjects to recall about ten percent more words.

“But playing a second word right after the first seems to disrupt the relevant memory processes that had hitherto been activated”, says Rasch. He and his team have concluded that it’s not the total information offered to the brain that is important. Instead, the brain just needs a nudge in order to enhance the ability to recall.

Only in the lab – for now

The results of this memory test were reflected in the brain wave patterns of the test subjects. While individual Dutch words were being played, the researchers recorded an enhancement in the waves characteristic of sleep and recollection (sleep spindles and theta-oscillation). But these activity patterns disappeared completely as soon as another word followed on from the first.

In a subsequent experiment, the researchers were also able to demonstrate that the time span between word pairs was of decisive importance. If the German translation followed only after 2 seconds instead of after 0.2 seconds, the disruptive effect disappeared. But there was still no enhancement of impact.

“For us, these results are further evidence that sleep promotes memory formation, with the brain spontaneously activating content that it had learnt beforehand. We were able to enhance this effect by playing back the words”, says Rasch. It’s as yet uncertain whether there will soon be an app to help people get better marks in their vocabulary tests. “Now we really want to get out of the controlled situation of the sleep lab, to see whether the impact we’ve observed can also be reproduced under realistic conditions in everyday life”, he says.

(*) Thomas Schreiner, Mick Lehmann and Björn Rasch (2015). Auditory feedback blocks memory benefits of cueing during sleep. Nature Communications. doi:10.1038/ncomms9729
(The SNSF can provide members of the media with a PDF file of this article. Please contact com@snf.ch)

Contact

Professor Björn Rasch
Cognitive Biopsychology and Methods
Department of Psychology
University of Fribourg
Tel: +41 26 300 76 37 and +41 77 445 65 64
E-mail: bjoern.rasch@unifr.ch

Weitere Informationen:

http://www.snsf.ch > Research in Focus > Media > Press releases

Media - Abteilung Kommunikation | idw - Informationsdienst Wissenschaft

Further reports about: Nature Communications everyday life foreign language

More articles from Studies and Analyses:

nachricht Europe’s Demographic Future. Where the Regions Are Heading after a Decade of Crises
10.08.2017 | Berlin-Institut für Bevölkerung und Entwicklung

nachricht Scientists reveal source of human heartbeat in 3-D
07.08.2017 | University of Manchester

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

A Map of the Cell’s Power Station

18.08.2017 | Life Sciences

Engineering team images tiny quasicrystals as they form

18.08.2017 | Physics and Astronomy

Researchers printed graphene-like materials with inkjet

18.08.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>