Detecting and monitoring fatigue: a review

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

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Contents

Motivation ReviewWhat is Fatigue?Fatigue DetectionFatigue MeasuresPhysiological MeasuresPerformance MeasuresSubjective Measures

Others FactorsConclusions


Motivation

Contribution to CAMCoF Project.

Analysis of a Human behavior.

Exposure Current systems

Different ways of fatigue detection


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.

4DETECTING AND MONITORING MENTAL FATIGUE: A REVIEW

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.


Application Contexts

Learning, Work, Productivity, Wellness and Health


Fatigue DetectionThere are three different ways to detect and monitor mental fatigue:

◦ Physiological Measurements:

◦ Human Performance:

◦ Subjective Measures:


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.


SmartCap


EyeCheck


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


Subjective Measures

Self-Report

Questionares

Fatigue Index


Fatigue Severity Scale (FSS)


NASA - TLX


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.


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

André Pimenta – [email protected] Novais – [email protected]é Neves – [email protected]

University of MinhoDepartment Of Informatics

February 14, 2014





Detecting and monitoring fatigue: a review

Health & Medicine

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