Validity and reliability of the Turkish version of the Commitment to Quitting Smoking Scale

Yavuz K. F.

DUSUNEN ADAM, vol.36, no.36, pp.208-215, 2023 (ESCI)

  • Publication Type: Article / Article
  • Volume: 36 Issue: 36
  • Publication Date: 2023
  • Doi Number: 10.14744/dajpns.2023.00226
  • Journal Name: DUSUNEN ADAM
  • Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus, Academic Search Premier, CINAHL, EMBASE, Psycinfo, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.208-215
  • Istanbul Medipol University Affiliated: Yes



Objective: The primary aim of this study is to adapt the Commitment to Quitting Smoking Scale (CQSS) to Turkish and to

conduct its reliability and validity studies in a Turkish sample.

Method: The study involved a total of 314 smokers, comprising 178 (56.7%) women and 136 (43.3%) men, aged between 18 and

65. Statistical analysis included item-total score correlation coefficients, internal consistency coefficient, test-retest reliability,

confirmatory factor analysis, criterion-dependent validity, and discriminant validity methods.

Results: Confirmatory factor analysis showed that the Turkish version of the CQSS maintains the single-factor structure of the

original form (χ2=35.042, χ2/df=2.061, Root Mean Square Residual (RMR)=0.035, Comparative Fit Index (CFI)=0.989, Goodness of

Fit Index (GFI)=0.974, Root Mean Square Error of Approximation (RMSEA)=0.058). In convergent validity, significant correlations

were observed between the CQSS and other measures like the Fagerstrom Test for Nicotine Dependence (FTND) and the

Questionnaire of Smoking Urges-Brief (QSU-Brief ). For discriminant validity, the 27% lower and upper groups method was used,

revealing significant differences in the CQSS scores between participants in these groups. In reliability analysis, the Cronbach’s

alpha coefficient for the CQSS was found to be 0.91. Test-retest reliability analysis showed a correlation coefficient of 0.71

between two measurements.

Conclusion: When considering all the findings, it is evident that the CQSS possesses adequate psychometric properties within

the sample of the Turkish-speaking population.

Keywords: Addiction, smoking cessation, quitting smoking, commitment, validity