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Detecting and monitoring fatigue: a review

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Detecting and monitoring fatigue: a review

  1. 1. Detecting and Monitoring Mental Fatigue: A review University of Minho Department Of Informatics André Pimenta – apimenta@di.uminho.pt Paulo Novais – pjon@di.uminho.pt José Neves – jneves@di.uminho.pt February 14, 2014 DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 1
  2. 2. Contents Motivation Review What is Fatigue? Fatigue Detection Fatigue Measures Physiological Measures Performance Measures Subjective Measures Others Factors Conclusions DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 2
  3. 3. Motivation Contribution to CAMCoF Project. Analysis of a Human behavior. Exposure Current systems Different ways of fatigue detection DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 3
  4. 4. What is Fatigue? Lack of energy, physical exertion, physical discomfort, lack of motivation, and sleepiness. ◦ Mental fatigue: dificulties with concentration, attention, visual perception, and somnolence. ◦ Physical fatigue: loss of muscle strength, speed or agility, thus limiting the performance of physical tasks. DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 4
  5. 5. Categories of Fatigue? ◦ Acute Fatigue: which occurs normally between a pair of major sleep periods. ◦ Cumulative fatigue: which accumulates over period of days or weeks to the insufficient recovery from successive periods of acute fatigue. ◦ Chronic fatigue: Psychoneurotic syndrome characterized by difficulty in committing oneself to an aggressive course of action. DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 5
  6. 6. Application Contexts Learning, Work, Productivity, Wellness and Health DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 6
  7. 7. Fatigue Detection There are three different ways to detect and monitor mental fatigue: ◦ Physiological Measurements: ◦ Human Performance: ◦ Subjective Measures: DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 7
  8. 8. Physiological Measurements A way of measuring mental fatigue is to measure the physiologies responses to behaviours of mental fatigue, response is usually measured by the energy expended in perform a set of tasks. DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 8
  9. 9. SmartCap DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 9
  10. 10. EyeCheck DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 10
  11. 11. Performance Performance decrement due to fatigue may be considered as a function which compares the time on task and the total quantity and/or quality of work performed in a given unit of time. Factors of influence: Task difficulty; Task workload; Motivation; Type of Task; DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 11
  12. 12. Fatigue Detection System in Distance Education DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 12
  13. 13. Subjective Measures Self-Report Questionares Fatigue Index DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 13
  14. 14. Fatigue Severity Scale (FSS) DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 14
  15. 15. NASA - TLX DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 15
  16. 16. Others Factors Age - Defines the mental age of the individual. It is important to understand the expected cognitive abilities of the individual, which may have a tendency to degrade with old age.  Gender - The mental states are different between men and women.  Professional occupation - Many occupations are intrinsically more tiresome or exhausting than others.  Consumption of alcohol and drugs - The use of certain substances for short or prolonged periods may cause dependencies and other effects that lead to a state of mental fatigue. DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 16
  17. 17. Conclusions There are three different ways to detect fatigue. Current systems do not consider the environment information. User profile is often not taken into account. Objective measures typically used for vehicle drivers. DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 17
  18. 18. Detecting and Monitoring Mental Fatigue: A review University of Minho Department Of Informatics André Pimenta – apimenta@di.uminho.pt Paulo Novais – pjon@di.uminho.pt José Neves – jneves@di.uminho.pt February 14, 2014 DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 18

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