Intelligent people are more likely to be nocturnal than people with lower IQ scores, according to a study by Satoshi Kanazawa, a psychologist at the London School of Economics and Political Science. Both on weekdays and at the weekend, they sleep at later hours and are mentally more active than other people.
In the study on young Americans, "results showed that intelligent individuals went to bed later on weeknights and weekends than their less intelligent counterparts," Ideapod reported. Kanazawa stated that "IQ average and sleeping patterns are most definitely related, proving that those who play under the moon are, indeed, more intelligent human beings." These people are generally called "night owls" and have better concentration capacity at night.
Based on Kanazawa's findings, intelligent people with an IQ score of over 125 sleep at 00:29 a.m. and wake up at 07:52 a.m. on weekdays while they go to bed around 1:44 a.m. on the weekend. Those with an IQ score of 75 or below go to bed at 11:41 p.m. on weekdays and 00:35 a.m. on the weekend. Also, people with a normal IQ level between 90 and 110 go to bed at 00:10 a.m. on weekdays and 1:13 a.m. on the weekend. The data shows the joint result that intelligent people stay awake longer into the night.