This document discusses mental workload and methods for measuring it. It defines mental workload as the cognitive demands placed on a person by a task. High mental workload tasks are described as stimulus-driven rather than self-paced, with large demand fluctuations and requiring multiple simultaneous tasks. Basic approaches to measuring mental workload include analytic methods based on task characteristics, physiological measures of arousal and effort, and subjective assessments. Specific analytic models and measures of resources, physiology, and subjective workload are also outlined.

1. Mental Workload Hillon I. Goa Seta A. Wicaksana Humanika Consulting

2. What is Mental Workload? Why measure it? Performance limits Predict top performance Tasks Cognitive/perceptual multiple

3. Tasks with High mental workload? N/A Computer programmer College professor Mathematician Technical writer High Air traffic control Pilot Military command & control Nuclear power plant operator anesthesiologist

5. Large fluctuations in demand

6. Multiple simultaneous tasks

10. Basic approaches to measuring mental workload Analytic Task difficulty Number of simultaneous tasks Task performance Primary task Secondary task Physiological (arousal/effort) Subjective assessment

14. Analytic Models Tracking models predict based on systems dynamics Queuing models predict on the basis of task co-occurrence SAINT / microSAINT best developed queuing models

18. Resources/Attention Some limited capacity Unitary: task always depletes common pool by a constant amount Multiple: task depletes pools of resources to varying degrees Mixed: cost of sharing even for highly dissimilar resources

26. Simplified HIP Model S E N S O R Y S T O R E Attention Working Memory Long Term Memory Unconscious/Automatic Processes

28. blood pressure

29. respiratory rate variability

30. tidal volume

31. ventilation

32. galvanic skin response

33. evoked response amplitude

34. evoked response latency

35. evoked response latency

36. electroencehpalogram,

37. spectral components

38. time domain,

39. flicker fusion frequency

40. pupil diameter

41. electromyograms

45. Subjective Workload Measures Cooper-Harris Manual control characteristics SWAT Dimension based instrument NASA 6-D assessment scales

51. TERIMA KASIH …