title: Towards an objective assessment of cockpit workload. I. Physiological variables during different flight phases.
mesh_terms: D000337:Aerospace Medicine; D001146:Arrhythmia, Sinus; D006339:Heart Rate; D006801:Humans; D008297:Male; D008328:Man-Machine Systems; D008606:Mental Processes; D012119:Respiration; D014937:Work