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Showing 2 results for Psychometrics
Shahnaz Pooladi, Fatemeh Dehghan-Azad, Mohammadreza Yazdankhahfard, Rahim Tahmasbi, Abdolreza Ahmadi,
Volume 6, Issue 2 (9-2017)
Abstract
Abstract
Background. Self-care behaviors in cardiac patients are one of the essential factors in their treatments. The failure to apply proper self-care behaviors reduces their recovery and imposes high costs on the health care system.
Aim. This study aimed for design and psychometric measurement of the questionnaire on attitude, knowledge and utilization of self-care for patients undergoing coronary artery bypass graft surgery based on Waltz model
Method. In this methodological study, the following four steps were conducted for design and psychometric measurement of the questionnaire: 1) defining the theoretical and practical self-care concept for patients undergoing coronary artery bypass graft surgery in the domains of physical activity, sexual activity, social activity, mental state, and smoking; 2) designing the items of the questionnaire using other instruments which are being used in heart diseases; 3) determining the face validity (the assessment of facility, difficulty, and ambiguity of the items and their importance for patients) and content validity of the questionnaire (the assessment of appropriateness and necessity of items by experts opinions and measuring CVR and CVI; 4) the internal consistency of the questionnaire was evaluated by determining the Cranach's alpha coefficient.
Findings. The first version of this questionnaire was produced with 56 items, of which 15 items were deleted during the process of validity and reliability confirmation. The final version of the questionnaire was provided with 41 items in three domains; knowledge domain with 14 items, attitude domain with 7 items and utilization domain with 20 items. The results of the psychometric procedure for the questionnaire was the content validity index of 0.99, the content validity ratio of 0.96 and the internal consistency of the questionnaire with Cronbach's alpha coefficient of 0.7 representing appropriate validity and reliability of the questionnaire.
Conclusion. This 41-item questionnaire can be utilized in the assessment process of these patients. Measuring construct validity is recommended for the validity of the domains of the present questionnaire.
Marzee Eskandari Hesari, Faezeh Sahbaeiroy, Jamile Mohatshami, Maryam Moradian,
Volume 11, Issue 1 (3-2022)
Abstract
Abstract
Aim. The aim of this study was to design and examine the psychometrics of post-traumatic stress disorder tool for children undergoing heart surgery
Background. Heart disease is one of the most important health issues and traumatic events that cause great harm to children, one of which is the experience of surgery. Therefore, we need a standard tool to assess post-traumatic stress disorder in children.
Method. In this methodological study, researchers compiled a questionnaire for measuring post-traumatic stress disorder in children undergoing heart surgery. The questionnaire was provided to 10 experts to examine the validity. In the next step, 40 items, revised by experts, were examined for construct validity and reliability based on the responses of 200 children 12-18 years old to questionnaire. The data were analyzed in SPSS version 24 and LISREL version 10.
Findings. After preparing the draft, the questionnaire was given to 10 experts to determine face and content validity. For face validity, the impact score of the items was computed and due to similar meaning of some items they were merged. In order to determine the content validity, two indexes of content validity ratio (CVR) and content validity index (CVI) were considered. According to Lauche's table, items with a content validity ratio less than 0.62 were excluded (7 items), items with a content validity ratio greater than 0.79 were accepted, and items with a content validity ratio between 0.70 and 0.79 were revised. In the construct validity stage, to ensure the sufficient sample size, the Kaiser-Meier-Elkin (KMO) test was performed and the results of Bartlett's Sphericity test were significant (P≤0.0001). Finally, exploratory factor analysis was performed with Varimax rotation on 40 items, and 7 items with a factor loading of less than 0.4 were removed, and in the end, 33 items remained. To determine the reliability of the questionnaire using the internal consistency method, Cronbach's alpha of the questions were computed and it was above 0.80 for all items. The test-retest results confirmed the significant relationship between the pre-test and post-test scores in 7 factors of the questionnaire (P≤0.0001).
Conclusion. In order to achieve more accurate results in research, it is necessary to use valid and reliable tools. The results of this study showed the strength of the factor structure and acceptable reliability of the post-traumatic stress tool for children undergoing heart surgery. The tool designed in this study is valid and reliable and can be used to determine post-traumatic stress in children undergoing heart surgery.
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