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Detecting and Monitoring Mental Fatigue: A review
André Pimenta – [email protected] Novais – [email protected]é Neves – [email protected]
University of MinhoDepartment Of Informatics
February 14, 2014
DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 1
Contents
Motivation ReviewWhat is Fatigue?Fatigue DetectionFatigue MeasuresPhysiological MeasuresPerformance MeasuresSubjective Measures
Others FactorsConclusions
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Motivation
Contribution to CAMCoF Project.
Analysis of a Human behavior.
Exposure Current systems
Different ways of fatigue detection
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What is Fatigue?
Lack of energy, physical exertion, physical discomfort, lack of motivation, and sleepiness.
◦ Mental fatigue: dificulties with concentration, attention, visual perception, andsomnolence.
◦ Physical fatigue: loss of muscle strength, speed or agility, thus limiting the performance of physical tasks.
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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.
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Application Contexts
Learning, Work, Productivity, Wellness and Health
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Fatigue DetectionThere are three different ways to detect and monitor mental fatigue:
◦ Physiological Measurements:
◦ Human Performance:
◦ Subjective Measures:
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Physiological MeasurementsA 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.
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SmartCap
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EyeCheck
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Performance
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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
Fatigue Detection System in Distance Education
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Subjective Measures
Self-Report
Questionares
Fatigue Index
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Fatigue Severity Scale (FSS)
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NASA - TLX
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Others FactorsAge - 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.
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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.
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Detecting and Monitoring Mental Fatigue: A review
André Pimenta – [email protected] Novais – [email protected]é Neves – [email protected]
University of MinhoDepartment Of Informatics
February 14, 2014
DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW 18