MedicalResearch.com Interview with: Frederick M. Brown, Ph.D. Associate Professor The Pennsylvania State University Department of Psychology, Cognitive and Wellness Director, Human Performance Rhythms Laboratory MedicalResearch.com:  What was the primary finding of your study? Dr. Brown: Time of day of an occupation, as well as a regular versus irregular routine, may influence whether a person wants to go into it or not. Most educational research has focused on academic major selection motivated by job aptitude, personality, and sociocultural factors. Our findings suggest that a person’s genetically determined built-in morning versus evening (M/E) preference for best time of day to work or sleep may influence career choice in two important ways: This M/E preference for work and sleep is related to 1) personality and to 2) the time of day the job is executed. These may interact with how much sleep a person thinks they need. In addition to the personality traits associated with M/E, such as morning people being more introverted and evening people more extroverted, an individual’s choice of major may be influenced by their preference for the typical work hours of a profession, such as a routine 9-to-5 schedule versus irregular evening and weekend work. (more…)