Office of Aerospace Medicine Technical Reports

FAA Office of Aerospace Medicine
Civil Aerospace Medical Institute


Report No: DOT/FAA/AM-73/22

Title and Subtitle: Physiological, biochemical, and psychological responses in air traffic control personnel: Comparison of the 5-day and 2-2-1 shift rotation patterns

Report Date: December 1973

Authors: Melton CE Jr, McKenzie JM, Smith RC, Polis BD, Higgins EA, Hoffmann SM, Funkhouser GE, Saldivar JT

Abstract: Stress in controllers on the straight five-day shift was determined at Houston Intercontinental Tower in 1970. In 1971 controllers on the 2-2-1 rotation were studied at the same tower. Controllers generally prefer the 2-2-1 to the straight five-day schedule because of the long week end associated with the 2-2-1. Management is concerned that the 'quick turnaround' on the 2-2-1 is a stressor that could compromise job performance.

Physiological and psychological assessments showed no significant stress differences on the two schedules. On neither of the schedules did the controllers' stress levels differ from the general polulation.

It was concluded that the stress differences on the two rotation patterns were too slight to be of real significance and a choice between them would have to rest on managerial considerations rather than biomedical ones.

Key Words: Air Traffic Controllers, Stress, Hormones, Psychological Tests, Control Towers, Shift work

No. of Pages: 16

Last updated: Friday, June 1, 2012