Assessing the Turkish version of the Individual Work Performance Questionnaire (IWPQ) for its validity and reliability.

Backgrounds: This study aimed to assess the validity and reliability of the Turkish version of the Individual Work Performance Questionnaire (IWPQ).

Methods: A total of 340 adult participants who had been working for at least 8 h a day completed the study questionnaire online. The questionnaire consisted of sections on demographics and socioeconomic characteristics, the IWPQ, and the ultrashortened version of the Utrecht Work Engagement Scale (UWES-3). Principal component analysis (PCA) with Promax rotation was conducted to assess the e three-factor structure for the Turkish version of the IWPQ. Cronbach's alpha was used to determine internal consistency. The intraclass correlation coefficient (ICC) was used to assess test-retest reliability. Spearman correlation coefficients were calculated between the IWPQ and UWES-3 scales to evaluate convergent validity.

Results: The three factors accounted for a total variance ratio of 60.7%. Cronbach's alphas of three subscales (task performance, contextual performance, and counterproductive work behavior) were 0.894, 0.875, and 0.796, respectively. Test-retest reliability showed high agreement, with ICCs of 0.96, 0.98, and 0.91 for the respective scales. There was a statistically significant correlation between UWES-3 and the task performance subscale (ρ = 0.367 and p < 0.001), a statistically significant correlation between UWES-3 and the contextual performance subscale (ρ = 0.403 and p < 0.001), and a statistically significant correlation between UWES-3 and the CWB subscale (ρ=-0.352 and p < 0.001).

Conclusions: The Individual Work Performance Questionnaire (IWPQ) identifies work performance.The Turkish version of the IWPQ scales demonstrated validity and reliability in assessing individual work performance.