Aerospace systems require pilots to perform complex tasks under demanding conditions. There is an unrecognized component, which has deleterious effects on human performance, called sopite syndrome. Sopite syndrome is characterized by intense drowsiness despite receiving an adequate night’s rest, difficulty concentrating, and lack of motivation. Currently, sopite syndrome is measured exclusively by a 39-item self-report questionnaire called the Mild Motion Questionnaire (MMQ). The purpose of the present research is to develop a shortform for the MMQ that can be used for quick assessments in applied settings, while maintaining internal consistency. Participants (N = 422) completed the MMQ by indicating how they feel following exposure to mild, non-sickening motion. Principal-axis factor analysis with oblimin rotation identified a twofactor solution comprised of 25-items with 2 dimensions: adverse effects and positive affect. Internal consistency was .86. Discussion of efforts to validate the short-form MMQ and the multidimensionality of sopite syndrome is included.
Brill, J. C.,
& Neilson, B. N.
(2011). A Factor-Analytical Perspective of Sopite Syndrome Assessment in Aerospace Systems. 16th International Symposium on Aviation Psychology, 369-374.