Showing 2 results for Standardization
Mohammad Gholami Fesharaki, Esfandyar Azadmarzabadi,
Volume 14, Issue 3 (7-2011)
Abstract
Background: Noticing the importance of measuring physical activity in medical investigations, this study was conducted to analyze the validity and reliability of the researcher-made Physical Activity Questionnaire (AFPAQ) of Azad and Fesharaki, so as to achieve a suitable tool.
Materials and Methods: In this cross-sectional study, the sample population all army men selected through two-stage cluster sampling according to Morgan samples table.
After investigating content validity, confirmatory and explanatory factor analysis, Pearson correlation (using general health questionnaire (GHQ) and test-retest coefficient were used to examine construct and predictive validity, respectively. Data analysis was done using SPSS software version 15 and Amos version 16.
Results: This study was done on 724 subjects including 54 (7.3%) women and 685 (92.7%) men. The CVR coefficient was 60% for this study. Also, explanatory factor analysis showed three factors, including physical activity at work, physical activity at leisure time, and exhaustion with 45% total variance and 71% Kaser-Meyer-Olkin Index. These factors were also confirmed by confirmatory factor analysis (AGFI=0.963, RMSEA=0.053). The reliability of the questionnaire was %40 and %70 using Cronbach's Alpha and test-re-test method, respectively.
Conclusion: Since validity and reliability indexes of the questionnaire were reported desirable, AFPAQ can be considered a valid and reliable questionnaire for measuring physical activity
Mohammad Gholami Fesharaki, Davood Talebian, Zohreh Aghamiri, Masome Mohamadian,
Volume 14, Issue 5 (11-2011)
Abstract
Background: This study was done to assess the validity and reliability of Najmie Job Satisfaction Questionnaire (NJSQ) in order to provide a suitable tool for measuring job satisfaction (JS).
Materials and Methods: In this cross-sectional study, 212 staff members at Najime Subspecialty Hospital were selected by stratified sampling method. The participants took NJSQ. After evaluating content validity, confirmatory and explanatory factor analysis and Cronbach's Alpha were used to examine construct validity and reliability of the questionnaire, respectively. SPSS software version 16 was used to analyze the data.
Results: The samples, 212 subjects, consisted of 181 (86.6%) women and 28 (13.4%) men. The explanatory factor analysis showed 4 factors with 54% total variance and 0.82% Kaser-Meyer-Olkin index. These factors were also verified by confirmatory factor analysis (P=0.368). In addition, the reliability of the questionnaire was reported to be 0.88% based on Cronbach's alpha method.
Conclusion: Since validity and reliability indexes were reported suitable, NJSQ can be considered a valid and reliable questionnaire for measuring JS.
