Deeper Sleep Stages Boost Problem-Solving Insights, Study Finds
A new study challenges previous research about which sleep stages help people achieve breakthrough moments in problem-solving. Researchers found that N2 sleep, a deeper stage of non-REM sleep, significantly increased participants' likelihood of experiencing sudden insights during a perceptual task. The preregistered study involved 90 participants who performed a visual pattern recognition task before and after a 20-minute daytime nap while researchers monitored their brain activity with EEG. Participants who reached N2 sleep showed an 85.7% rate of achieving insights about a hidden strategy in the task, compared to 63.6% for those who only reached N1 sleep (the first stage of non-rapid eye movement sleep) and 55.5% for participants who remained awake. The findings contradict earlier work by Lacaux and colleagues, which suggested that lighter N1 sleep promoted insight while deeper sleep hindered it. News coverage: Stuck on a problem? Take a nap!

Read more of this story at Slashdot.