A pilot investigation into the neuroendocrine correlates of personality in the workplace.

Pilot data are reported on the relation rate of adaptation to a change in usual patterns of circadian behaviour by personality scores. Personality was defined through scores on the Eysenck Personality Inventory and change in circadian behavior as working a random day shift in a predominately night shift work schedule. The rate of adaptation to change in circadian behavior pattern was recorded by levels of salivary Cortisol for each subject. 4 persons scoring high on Extraversion produced more Cortisol during the day shift, while the 2 scoring high on Intraversion produced more during the night shift.