l Typical Performance vs Task load Curve Task load Helicopter observation of driver Example
Interface Curve System Supervisory Control Computer Display Control Sensors Direct Observation Typical Performance vs. Task Load Performance Task Load Helicopter Observation of Driver Example
Off nominal considerations System design often driven by off-nominal conditions 口 Emergencies 日 System Failures O Failure of the automation system Secondary task considerations Cockpit Example 日 Emergency diversion 口 Depressurization
Interface System Supervisory Control Computer Display Control Sensors Direct Observation Off Nominal Considerations ü System design often driven by off-nominal conditions o Emergencies o System Failures o Failure of the Automation system ü Secondary task considerations ü Cockpit Example o Emergency diversion o Depressurization
Workload measurement Approaches Objective Performance Approaches u Primary Task(Yerks Dodson) u Secondary Task (works well to measure saturation threshold) Concept of Spare Cognitive Capacity Objective Physiological Measures(weak) 口 Heart Rate Variability 口 Pupil Diameter 口EEGP300 J Skin Galvanic Response 口 New Imaging methods Subjective Workload Assessment Techniques 口 Formal Q Direct Query
Interface System Supervisory Control Computer Display Control Sensors Direct Observation Workload Measurement Approaches ü Objective Performance Approaches o Primary Task (Yerks Dodson) o Secondary Task (works well to measure saturation threshold) u Concept of Spare Cognitive Capacity ü Objective Physiological Measures (weak) o Heart Rate Variability o Pupil Diameter o EEG P 300 o Skin Galvanic Response o New Imaging Methods ü Subjective Workload Assessment Techniques o Formal o Direct Query
Subjective Assessment Techniques Simpson-Sheridan/ Cooper-Harper · Bedford scale Rate or perceived Exertion(RPE NASA Task Load Index(TLx) Defense Research Agency Workload Scale (DRAWS) Malvern Capacity Estimate ( MCE)
Interface System Supervisory Control Computer Display Control Sensors Direct Observation Subjective Assessment Techniques ü Simpson-Sheridan/ Cooper-Harper ü Bedford Scale ü Rate or Perceived Exertion (RPE) ü NASA Task Load Index (TLX) ü Defense Research Agency Workload Scale (DRAWS) ü Malvern Capacity Estimate (MCE)
Simpson-Sheridan Scale Modified Cooper Harper Scale for Workload
Interface System Supervisory Control Computer Display Control Sensors Direct Observation Simpson-Sheridan Scale ü Modified Cooper Harper Scale for Workload