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Measuring Work Functioning: Validity of a Weighted Composite Work Functioning Approach.

Edwin J Boezeman1, Judith K Sluiter, Karen Nieuwenhuijsen

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This study validates a weighted composite measure for work functioning. The approach accurately assesses work role functioning, productivity, and quality of life, distinguishing between healthy and health-impaired workers.

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Area of Science:

  • Occupational Health
  • Psychometrics
  • Workplace Productivity

Background:

  • Assessing work functioning is crucial for understanding employee well-being and productivity.
  • Existing measures may not fully capture the multifaceted nature of work functioning.
  • A comprehensive and valid measurement tool is needed to evaluate work capacity and performance.

Purpose of the Study:

  • To examine the construct validity of a weighted composite approach for measuring work functioning.
  • To determine if a composite score, weighted by the relative importance of different aspects, accurately reflects overall work functioning.
  • To assess the measure's ability to differentiate between various levels of work functioning and related constructs.

Main Methods:

  • A composite survey measured four key work functioning aspects: capacity, quality, quantity, and recovery.
  • Pre-established weights were applied to calculate a composite weighted work functioning score.
  • Convergent, divergent, and discriminative construct validity were examined using correlations and t-tests with measures of work role functioning, productivity, and quality of life.

Main Results:

  • The weighted composite work functioning measure demonstrated strong convergent validity, correlating highly with work role functioning and productivity.
  • Moderate correlations with physical quality of life and weaker correlations with mental quality of life indicated fair divergent validity.
  • The measure effectively discriminated between health-impaired and healthy workers, showing significantly worse work functioning in the impaired group with a large effect size.

Conclusions:

  • The weighted composite work functioning measurement approach is a valid tool for assessing employee work functioning.
  • It effectively incorporates the relative importance of different work functioning aspects.
  • The approach shows good convergent and discriminative validity, and fair divergent validity, making it suitable for occupational health research and practice.