What’s a chronotype and why does it matter?

A person’s chronotype is essentially the time in which she/he prefers to be awake and active.

• Some people are more morning types and prefer to start the day during the early morning, while others are more evening types and would rather go to bed later in the night and wake later in the day. 
• Young adults often prefer evening activity more than morning activity, while those who are older often prefer the morning rather than the evening. But this isn’t always the case.  
• Chronotypes may also be linked with how people choose romantic partners and even their satisfaction with their relationship.

In a word, yes, chronotypes can matter for relationships. However, the mechanisms behind chronotype similarity and relationship satisfaction are complex.

• Couples who have similar chronotypes, for example both morning types or both evening types, are more likely to be satisfied with th...