Experience-dependent induction of hypnagogic images during daytime naps: a combined behavioural and EEG study.
Journal of Sleep Research February 1, 2012 Caroline Kusse, Anahita Shaffii-LE Bourdiec, Jessica Schrouff et al.
This study characterizes hypnagogic hallucinations reported during a polygraphically recorded 90-min daytime nap following or preceding practice of the computer game Tetris. In the experimental group (N = 16), participants played Tetris in the morning for 2 h during three consecutive days, while in a first control group (N = 13, controlling the effect of experience) participants did not play...