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Correctness of Self-Reported Task Durations: A Systematic Review.

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Self-reported task durations in occupational epidemiology are moderately accurate at the individual level, often overestimating true durations. Average group-level reports may be suitable for certain studies, but individual accuracy is a concern.

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Area of Science:

  • Occupational Epidemiology
  • Ergonomics
  • Psychometrics

Background:

  • Accurate measurement of task duration is crucial in occupational epidemiology for assessing job exposures.
  • Self-reports are commonly used but prone to systematic and random errors, potentially biasing results.
  • Understanding the accuracy of self-reported task durations is vital, especially for musculoskeletal disorder risk assessment.

Purpose of the Study:

  • To systematically review the correctness of self-reported task durations compared to reference data.
  • To identify factors influencing the accuracy of self-reported task durations.
  • To evaluate the suitability of self-reported durations for individual and group-level exposure assessments.

Main Methods:

  • Systematic literature search across multiple scientific databases (e.g., Web of Science, MEDLINE).
  • Inclusion of studies examining occupational and non-occupational tasks with self-reported durations.
  • Analysis of agreement between self-reported durations and more valid reference data for 182 tasks.

Main Results:

  • Self-reported task durations showed moderate correctness, with average proportional errors ranging from -50% to +100%, often overestimating.
  • While individuals could distinguish longer from shorter tasks, actual duration accuracy was limited; 22% of tasks were overestimated by 100% or more.
  • Factors like task type, true duration, and pattern influenced accuracy, but musculoskeletal health status did not show a clear effect.

Conclusions:

  • Self-reported task durations have limited accuracy at the individual level for detailed exposure assessment.
  • Group-level average self-reports may be sufficiently accurate for studies on relative task occurrence.
  • Further research is needed to understand and mitigate biases in self-reported durations and guide their appropriate use.