According to “Psychology Today,” intelligent people are more likely to be nocturnal than people with lower IQ scores. In a study run on young Americans, results showed that intelligent individuals went to bed later on weeknights and weekends than their less intelligent counterparts.
In another study published by “Study Magazine,” the relationship between bedtimes & wake-up times for Americans in their 20s and their IQ score is reported as such:
Very Dull (IQ < 75)
Weekday: 11:41 pm -7:20 am
Weekend: 12:35 am -10:09 pm
Normal (90 < IQ < 110)
Weekday: 12:10 am -7:32 am
Weekend: 1:13 am -10:14 am
Very Bright (IQ > 125)
Weekday: 12:29 am -7:52 am
Weekend: 1:44 am -11:07 am