Hi,
I understand that reliability should be calculated during pilot test. However, my question is do you calculate for the actual results from the actual survey as well?
If so which results do you present in the research- reliability from pilot test or actual survey?
Is there a possibility for the results to be hugely different from one to another? For instance, let's say pilot survey reliability is .9 and then in the actual survey is .3?
Thanks
Hello Abi
1. Yes, the reliability measures should be calculated from the pilot experiment, and for checking could be calculated based on actual data.
2. Your results, i.e 0.9 and 0.3 are not consistent and some errors were occurred.
3. The reliability measures could be developed for the whole questionnaire or for each dimension of the questionnaire .
4. Reliability consists of several measures:
Item alpha reliability, Item alpha reliability if item deleted and split-half reliability assess the internal consistency of a questionnaire.
5. Each measure has different purposes.
6. For more information, please refer to,
Landau, S. and Everitt, B. S.(2004). A Handbook of Statistical analyses using SPSS.
Howitt, D. and Cramer, D.(2008). Introduction to SPSS.
Regards,
Zuhair
Dear Abi
One of my papers on reliability and validity is given below and it is available in my page, and it may be useful for you,
Z. A. Al-Hemyari and A. M. Al-Sarmi (2016). Validity and Reliability of Students and Academic Staff’s Surveys to Improve Higher Education. Educational Alternatives, Journal of International Scientific Publications, Vol.14, pp. 242-263.
Regards,
Zuhair
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