The study’s lead author, Dr Raha West, said: “Our study found that adults who are naturally more active in the evening (what we called ‘eveningness’) tended to perform better on cognitive tests than those who are ‘morning people’. Rather than just being personal preferences, these chronotypes could impact our cognitive function.”
Article source: https://www.huffingtonpost.co.uk/entry/sleep-habits-intelligence_uk_6a59e85ae4b042a7aac75bc5