Morning and evening-types: Exploring their personality styles

The aim of the present study was to explore the personality styles of morning and evening-types. Given that personality aspects of both types are a consequence of their coping with environmental and social demands, it was reasonable to consider the extent to which morning and evening-types differ, both in the way they perceive the environment and negotiate with others in their social spheres. A sample of 360 university students, age range 18–30 years completed the Composite Scale of Morningness (CSM), and Millon Index of Personality Styles (MIPS). As well as sex differences on personality styles, the results showed that morningness–eveningness orientation was related both to the manner in which individuals seek out, regulate, internalize, and transform information about their environments and themselves (thinking styles), and to the way in which people relate to and negotiate with others in their social spheres (behaving styles), mediating the feelings that motivate them and cognitions they have come to have.