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Development of an instrument based on the theory of planned behavior variables to measure factors influencing Iranian adults' intention to quit waterpipe tobacco smoking.

ABSTRACT: Background:Theory of planned behavior (TPB) is one of the most widely used theoretical frameworks to explain addictive behaviors, such as tobacco smoking. The aim of this study is to develop and validate an instrument based on TPB variables to measure factors influencing Iranian rural adults' intention to quit waterpipe tobacco smoking. Methods:This study was performed on a sample of rural adult waterpipe consumers living in two villages in Shiraz, Southern Iran. In the beginning, the initial items of instrument were extracted from the literature review and interviews with 20 waterpipe consumers. After that, face validity and qualitative content validity of the items were appraised. To measure quantitative content validity index (CVI) and the content validity ratio (CVR), a panel of experts reviewed the items. In addition, the exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were applied to characterize the construct validity of the instrument. Finally, Cronbach's alpha coefficient and intraclass correlation coefficient (ICC) were computed. Results:CVI and CVR of items were within the ranges of 0.89-0.95 and 0.85-0.96, respectively. EFA indicated the Kaiser-Meyer-Olkin (=0.71) and Bartlett's test of sphericity was significant (=912.36, df=105, p<0.0001). Principal component analysis revealed that 15 items could be grouped into four subscales that accounted for 64.97% of the variance. Based on CFA, two items were deleted. CFA results showed that the remained data were fit to the model. The Cronbach's alpha and ICC of subscales were, respectively, in the ranges of 0.72-0.87 and 0.64-0.82. Finally, a 13-item instrument with four subscales was confirmed. Conclusions:The findings reveal that the developed TPB instrument is a reliable and valid scale to identify the determinants of the intention to quit waterpipe smoking among Iranian rural adults.

SUBMITTER: Mirzaei N

PROVIDER: S-EPMC6767482 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Development of an instrument based on the theory of planned behavior variables to measure factors influencing Iranian adults' intention to quit waterpipe tobacco smoking.

Mirzaei Nasim N Dehdari Tahereh T Taghdisi Mohammad Hossein MH Zare Najaf N

Psychology research and behavior management 20190924

<h4>Background</h4>Theory of planned behavior (TPB) is one of the most widely used theoretical frameworks to explain addictive behaviors, such as tobacco smoking. The aim of this study is to develop and validate an instrument based on TPB variables to measure factors influencing Iranian rural adults' intention to quit waterpipe tobacco smoking.<h4>Methods</h4>This study was performed on a sample of rural adult waterpipe consumers living in two villages in Shiraz, Southern Iran. In the beginning, ...[more]

PMID: 31576183

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Project description:BackgroundBlood shortage is a persistent problem affecting Taiwan's health-care system. The theory of planned behavior (TPB) has been commonly used in studies of health advocacy. The purpose of this study was to develop a questionnaire measuring clinicians' intention to prescribe transfusion based on the TPB.MethodA questionnaire comprising 15 items for assessing clinicians' intention to prescribe blood transfusion was developed, and it collected demographic characteristics, tested patient blood management (PBM) and perceived knowledge of PBM. Furthermore, the questionnaire contained four subscales related to the TPB. A total of 129 clinicians participated in this pilot study between July and December2020. Item analysis and exploratory factor analysis were conducted to examine the validity and reliability of this measurement instrument.ResultsThe results indicated no statistically significant correlations between the demographic characteristics and PBM test scores. Regarding perceived knowledge, the results of a one-way analysis of variance revealed that the effect of age, hierarchy of doctors, and education level were significant. In terms of subjective norms, a significant effect on education level was noted [t (129) = 2.28, p < 0.05], with graduate school graduates receiving higher scores than college graduates. An analysis of variance demonstrated the effects of hierarchy, education level, and medical specialty on perceived behavioral control. The results of the regression analyses revealed that perceived knowledge (β = 0.32, p < 0.01) and subjective norms (β = 0.22, p < 0.05) were significantly related to clinicians' behavioral intentions.ConclusionsThis study revealed that factors affecting clinicians' blood transfusion management can be explained using the TPB-based questionnaire. This study demonstrated that physicians' perceptions of whether most people approve of PBM and their self-assessment of their PBM knowledge affect their intentions to proceed with PBM. According to this finding, a support system among physicians must be established and maintained to increase physicians' confidence in promoting PBM.

Project description:BackgroundEven though evolution is the overarching principle that connects all areas of biology, a significant proportion of pre-service teachers do not intend to teach evolution, minimize the teaching of evolution, or teach alternative ideas in biology classes. To prevent adverse teaching practices and promote effective pre-service teacher education, we aimed to identify and analyze variables that foster or hinder their behavioral intentions to teach evolution.MethodWe adopted a behavioral psychology research perspective and developed a research model based on the theory of planned behavior to examine behavioral intentions for teaching evolution in biology classrooms. We extended the model with additional variables that have been delineated by teacher education research as essential determinants for the behavioral intention to teach evolution. We proposed several hypotheses suggesting that the attitude toward teaching evolution, subjective norms, perceived behavioral control, personal religious faith, perceived usefulness, and knowledge about evolution determine a person's behavioral intention. We conducted a quantitative cross-sectional study in teacher education to test the hypotheses and surveyed N = 339 pre-service biology teachers using an online questionnaire. We analyzed the data using a two-stage structural equation model.ResultsWe were able to confirm all proposed hypotheses. The most important results revealed that pre-service teachers' knowledge about and perceived usefulness of evolution are only moderately pronounced. Moreover, the subjective norm is a predictor not only of behavioral intention but also of the attitude toward teaching evolution. The variable of perceived behavior control partly moderates the relationship between knowledge about evolution and behavioral intention. Additionally, perceived usefulness is an important and marginally stronger predictor of a person's attitude than personal religious faith.ConclusionThe extended model of the theory of planned behavior has highlighted the need for educational programs to increase knowledge about and the perceived usefulness of evolution even stronger. The findings delineated the effects of essential determinants on behavioral intentions and provided information about the necessary levers of teacher education.Supplementary informationThe online version contains supplementary material available at 10.1186/s12052-022-00175-1.

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Development of an instrument based on the theory of planned behavior variables to measure factors influencing Iranian adults' intention to quit waterpipe tobacco smoking.

Publications

Development of an instrument based on the theory of planned behavior variables to measure factors influencing Iranian adults' intention to quit waterpipe tobacco smoking.

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