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 first to predict which oil and gas wells are leaking methane
21.12.2018 | University of Vermont

nachricht Droughts boost emissions as hydropower dries up
21.12.2018 | Stanford's School of Earth, Energy & Environmental Sciences

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: Bifacial Stem Cells Produce Wood and Bast

Heidelberg researchers study one of the most important growth processes on Earth

So-called bifacial stem cells are responsible for one of the most critical growth processes on Earth – the formation of wood.

Im Focus: Energizing the immune system to eat cancer

Abramson Cancer Center study identifies method of priming macrophages to boost anti-tumor response

Immune cells called macrophages are supposed to serve and protect, but cancer has found ways to put them to sleep. Now researchers at the Abramson Cancer...

Im Focus: Ten-year anniversary of the Neumayer Station III

The scientific and political community alike stress the importance of German Antarctic research

Joint Press Release from the BMBF and AWI

The Antarctic is a frigid continent south of the Antarctic Circle, where researchers are the only inhabitants. Despite the hostile conditions, here the Alfred...

Im Focus: Ultra ultrasound to transform new tech

World first experiments on sensor that may revolutionise everything from medical devices to unmanned vehicles

The new sensor - capable of detecting vibrations of living cells - may revolutionise everything from medical devices to unmanned vehicles.

Im Focus: Flying Optical Cats for Quantum Communication

Dead and alive at the same time? Researchers at the Max Planck Institute of Quantum Optics have implemented Erwin Schrödinger’s paradoxical gedanken experiment employing an entangled atom-light state.

In 1935 Erwin Schrödinger formulated a thought experiment designed to capture the paradoxical nature of quantum physics. The crucial element of this gedanken...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Our digital society in 2040

16.01.2019 | Event News

11th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Aachen, 3-4 April 2019

14.01.2019 | Event News

ICTM Conference 2019: Digitization emerges as an engineering trend for turbomachinery construction

12.12.2018 | Event News

 
Latest News

How our cellular antennas are formed

22.01.2019 | Life Sciences

Proposed engineering method could help make buildings and bridges safer

22.01.2019 | Architecture and Construction

Bifacial Stem Cells Produce Wood and Bast

22.01.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>