Construct validity of the individual work performance questionnaire.

Area of Science:

• Occupational Health Psychology
• Psychometrics
• Human Resources Management

Background:

• Individual work performance is a critical factor in organizational success.
• Accurate measurement of work performance is essential for research and practical applications.
• Existing instruments may lack comprehensive validation across diverse workforces.

Purpose of the Study:

• To rigorously examine the construct validity of the Individual Work Performance Questionnaire (IWPQ).
• To establish the IWPQ as a reliable and valid instrument for measuring individual work performance.
• To assess the IWPQ's utility across various occupational sectors and worker health conditions.

Main Methods:

• A large-scale study involving 1424 Dutch workers from blue, pink, and white-collar sectors.
• Convergent validity was assessed by correlating IWPQ scores with presenteeism and work engagement.
• Discriminant validity was evaluated by comparing IWPQ scores between known groups (e.g., differing job satisfaction, health status).

Main Results:

• IWPQ scores showed weak to moderate correlations with presenteeism and work engagement, supporting convergent validity.
• Significant differences in IWPQ scores were found between workers with varying levels of job satisfaction and differing health statuses, supporting discriminant validity.
• The findings suggest the IWPQ effectively differentiates between groups based on relevant work-related factors.

Conclusions:

• The Individual Work Performance Questionnaire (IWPQ) exhibits acceptable construct validity.
• The IWPQ is a reliable and valid instrument for comprehensively measuring individual work performance.
• This questionnaire is suitable for use across diverse occupational sectors and in populations with varying health conditions.