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KMID : 1100920230440020109
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Korean Journal of Family Medicine
2023 Volume.44 No. 2 p.109 ~ p.116
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Development and Psychometric Properties of an Extended Theory of Planned Behavior Questionnaire for Childbearing Intentions and Behaviors in Iran
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Moeini Babak
Erfani Amir
Barati Majid
Doosti-Irani Amin
Hosseini Hatam
Soheylizad Mokhtar
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Abstract
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Background: Childbearing is the most important determinant of population fluctuations, and its study is more im-portant than other population phenomena. Owing to the lack of a valid questionnaire based on the extended theo-ry of planned behavior, this mixed-method study was conducted to determine the validity and reliability of a ques-tionnaire designed to examine related belief-based factors on the intention to bear children in Iranian society.
Methods: This study was conducted in two phases in Hamadan city, western Iran, in 2021. Phase 1 consisted of an extensive literature review and a qualitative study using a directed content analysis approach to generate an item pool. Psychometrics were measured in phase 2, including content, face, and construct validity. Reliability was as-sessed based on internal consistency and stability. The collected data were analyzed using IBM SPSS and AMOS ver. 24.0.
Results: Mean content validity ratio and content validity index were 0.7 and 0.85, respectively. Exploratory factor analysis of the 32 items identified an eight-factor solution. These factors jointly accounted for 79.1% of the observed variance in the outcome variables. Confirmatory factor analysis indicated a good fit for the data. The internal con-sistency based on Cronbach’s α was 0.85 (0.71?0.93). In addition, stability was confirmed using the test-retest method and intraclass correlation coefficient (0.74?0.94).
Conclusion: The designed questionnaire is a valid and reliable instrument for evaluating related belief-based fac-tors on the intention and behavior of childbearing among married men and women in Iran.
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KEYWORD
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Psychometric, Validity, Reliability, Fertility
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