For my research I have to have a pretest and post-test between which there is an instructional treatment. I need to pilot test the items of (pre- post-tests). Which statistical procedure of calculating reliability and item analysis on SPSS is appropriate?
Assuming all the items are intended to measure the same underlying variable, you can compute Cronbach's alpha. SPSS includes options to obtain inter-item correlations/covariances as well:
https://statistics.laerd.com/spss-tutorials/cronbachs-alpha-using-spss-statistics.php
Dear Hemn Adil Karim
To test the internal consistency, you can run the Cronbach's alpha test using the reliability command in SPSS, as follows: RELIABILITY /VARIABLES=q1 q2 q3 q4 q5. You can also use the drop-down menu in SPSS, as follows: From the top menu, click Analyze, then Scale, and then Reliability Analysis.
Kind Regards
Qamar Ul Islam
Thank you so much dear Qamar Ul Islam Qamar Ul Islam, for such an informative response.
Item analysis and cronbach alpha can be done for reliability of the test
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