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. 2023 Feb 23;14:1117645. doi: 10.3389/fpsyt.2023.1117645

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Copyright © 2023 Eigl, Urban-Ferreira and Schabus.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Subjective values assessed by sleep diaries from pre- to post-intervention. Note that EG1 improved tendentially in (A) sleep quality, (C) vitality, and (D) mood, but not in (B) well-being, and the EG2 improved significantly on all parameters, while the CG did not show any improvements. Measurements were assessed daily and averaged over a week each. EG1 (n = 34), EG2 (n = 32), and CG2 (n = 32). Asterisks represent significant results, *p < 0.05, +p < 0.10, two-tailed. Error bars display ±1 standard error. EG1, experimental group one; EG2, experimental group two; CG, control group.