Quality of Life Research

, Volume 14, Issue 5, pp 1357–1362

The Situational Fatigue Scale: A different approach to measuring fatigue



Fatigue can be defined as a subjective state of an imbalance in the availability of inner resources needed to perform physical or mental activities. The level of fatigue is determined not only by the availability of inner resources but also by the demands of the activities performed. Most conventional fatigue scales require subjects to rate their level of fatigue without specifying the situation. In the present study, we constructed a subjective rating scale, the Situational Fatigue Scale (SFS), with which subjects estimated their level of fatigue in specific activities of daily life. We administered the SFS, along with the Fatigue Assessment Instrument (FAI) to 96 outpatients in a family-medicine clinic and to 62 college students to assess the psychometric properties of the SFS. Principle component analysis revealed two underlying factors: physical fatigue and mental fatigue. SFS scores were significantly correlated with several FAI scores and differentiated patients complaining of fatigue from those who did not. The SFS also showed good internal consistency and test–retest reliability. These results suggest that the SFS could be a useful tool to measure a different dimension of the broad concept of fatigue.


Fatigue Rating scale Reliability Validity 



Dutch Exertion Fatigue Scale


Fatigue Assessment Instrument


Mental Fatigue Subscale


Physical Fatigue Subscale


Situational Fatigue Scale


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Copyright information

© Springer 2005

Authors and Affiliations

  1. 1.Department of PsychologyNational Chengchi UniversityTaipeiTaiwan
  2. 2.Department of Family MedicineNational Cheng-Kung UniversityTainanTaiwan

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