Item Selection in Development of WHOQOL-OLD
Jiqian Fang · Zhongguo xinli weisheng zazhi · 2004
Objective: Selecting items from item pool for the development of WHOQOL-OLD by six statistical methods. Testing the function of Cronbach α and test-retest reliability method for item selection.Methods:Collecting data by the means of multistage sampling, two new methods based on Cronbach α and test-retest reliability were employed to select items in view of internal consistency and stability in addition to the commonly used methods such as methods of dispersion and correlation coefficient. Results: Items selected by different methods were remained to constitute the old module of WHOQOL; items with high internal consistency or high stability were selected by methods based on Cronbach α and test-retest reliability. Conclusion: The four commonly used methods select items from aspects of representation, independence and discrimination, while methods based on Cronbach α and test-retest reliability select the items in view of internal consistency and stability. The two new methods are recommended together with the conventional methods in item selection.