Exposure to relaxing words during sleep promotes slow-wave sleep and subjective sleep quality.

"Disclosure Statement Financial Disclosure: E.L. is an employee of The Siesta Group Schlafanalyse GmbH. J.B. and B.R. have nothing to disclose. Non-Financial Disclosure: J.B., E.L., and B.R. have nothing to disclose. Financial Disclosure : E.L. is an employee of The Siesta Group Schlafanalyse GmbH. J.B. and B.R. have nothing to disclose. Non-Financial Disclosure: J.B., E.L., and B.R. have nothing to disclose. Conflict of interest statement . None declared."

"Funding This study was conducted at the University of Fribourg, Department of Psychology, Division of Cognitive Biopsychology and Methods. This work was supported by a grant of the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement number 667875)."