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 New study: How does Europe become a leading player for software and IT services?
03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)

nachricht Reusable carbon nanotubes could be the water filter of the future, says RIT study
30.03.2017 | Rochester Institute of Technology

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: Making lightweight construction suitable for series production

More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.

Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...

Im Focus: Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Fighting drug resistant tuberculosis – InfectoGnostics meets MYCO-NET² partners in Peru

28.04.2017 | Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

 
Latest News

Wireless power can drive tiny electronic devices in the GI tract

28.04.2017 | Medical Engineering

Ice cave in Transylvania yields window into region's past

28.04.2017 | Earth Sciences

Nose2Brain – Better Therapy for Multiple Sclerosis

28.04.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>