Reliability Analysis and Cronbach's Alpha in SPSS

Basic idea about reliability analysis is discussed and briefly explained:
internal consistency reliability,
calculation of Cronbach's alpha in SPSS along with interpretation,
difference between reliability analysis and Cronbach's alpha
alpha is also discussed. At the end of video, you will know:
1. What is reliability analysis and why it is important,
2. What is Cronbach's alpha?
3. What is internal consistency reliability?
4. How to Conduct Reliability analysis in SPSS
5. How to determine the level of reliability of an instrument,
6. How to assess weak items to improve reliability,
7. How to interpret Cronbach's alpha values,
8. How to determine weak, acceptable, good and excellence reliable instrument.
Watch the full video for clear understanding. Your comments / suggestions/ questions and subscription will be highly appreciated.
𝐒𝐞𝐬𝐬𝐢𝐨𝐧 𝟏 (𝐁𝐚𝐬𝐢𝐜 𝐨𝐟 𝐒𝐏𝐒𝐒, 𝐃𝐚𝐭𝐚 𝐚𝐧𝐝 𝐯𝐚𝐫𝐢𝐚𝐛𝐥𝐞 𝐞𝐧𝐭𝐫𝐢𝐞𝐬, 𝐃𝐞𝐬𝐜𝐫𝐢𝐩𝐭𝐢𝐯𝐞 𝐒𝐭𝐚𝐭𝐢𝐬𝐭𝐢𝐜𝐬)
• SPSS Webinar Session 1...
𝐒𝐞𝐬𝐬𝐢𝐨𝐧 𝟐 (𝐈𝐧𝐝𝐞𝐩𝐞𝐧𝐝𝐞𝐧𝐭 𝐭 𝐭𝐞𝐬𝐭, 𝐝𝐞𝐩𝐞𝐧𝐝𝐞𝐧𝐭 𝐭 𝐭𝐞𝐬𝐭 𝐰𝐢𝐭𝐡 𝐞𝐱𝐚𝐦𝐩𝐥𝐞𝐬 𝐢𝐧 𝐒𝐏𝐒𝐒)
• SPSS Webinar Session 2...
𝐒𝐞𝐬𝐬𝐢𝐨𝐧 𝟑 (𝐂𝐨𝐫𝐫𝐞𝐥𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐑𝐞𝐠𝐫𝐞𝐬𝐬𝐢𝐨𝐧 𝐢𝐧 𝐒𝐏𝐒𝐒)
• SPSS Webinar Session 3...
These are some of my brief videos on statistical tests:
𝐂𝐡𝐢-𝐒𝐪𝐮𝐚𝐫𝐞 𝐓𝐞𝐬𝐭𝐬
• Chi Square Test
𝐂𝐨𝐫𝐫𝐞𝐥𝐚𝐭𝐢𝐨𝐧
• Correlation (Pearson's...
𝐈𝐧𝐝𝐞𝐩𝐞𝐧𝐝𝐞𝐧𝐭 𝐭 𝐭𝐞𝐬𝐭
• Independent t test
𝐃𝐞𝐩𝐞𝐧𝐝𝐞𝐧𝐭 𝐭 𝐭𝐞𝐬𝐭
• Dependent t test
𝐀𝐍𝐎𝐕𝐀
• ANOVA (Analysis of Var...
𝐇𝐨𝐰 𝐭𝐨 𝐖𝐫𝐢𝐭𝐞 𝐄𝐟𝐟𝐞𝐜𝐭𝐢𝐯𝐞 𝐋𝐢𝐭𝐞𝐫𝐚𝐭𝐮𝐫𝐞 𝐑𝐞𝐯𝐢𝐞𝐰
• Writing Effective Lite...
𝐑𝐞𝐥𝐢𝐚𝐛𝐢𝐥𝐢𝐭𝐲 𝐀𝐧𝐚𝐥𝐲𝐬𝐢𝐬
• Reliability Analysis a...
Session 1 𝐐𝐮𝐚𝐥𝐢𝐭𝐚𝐭𝐢𝐯𝐞 𝐃𝐚𝐭𝐚 𝐀𝐧𝐚𝐥𝐲𝐬𝐢𝐬 𝐰𝐢𝐭𝐡 𝐍𝐯𝐢𝐯𝐨: 𝐇𝐚𝐧𝐝𝐬-𝐨𝐧 𝐓𝐫𝐚𝐢𝐧𝐢𝐧𝐠
• Qualitative Data Analy...
Session 2 𝐐𝐮𝐚𝐥𝐢𝐭𝐚𝐭𝐢𝐯𝐞 𝐃𝐚𝐭𝐚 𝐀𝐧𝐚𝐥𝐲𝐬𝐢𝐬 𝐰𝐢𝐭𝐡 𝐍𝐯𝐢𝐯𝐨: 𝐇𝐚𝐧𝐝𝐬-𝐨𝐧 𝐓𝐫𝐚𝐢𝐧𝐢𝐧𝐠
• Qualitative Data Analy...
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[@nidashahzad9371]

Very informative.... Thank you for sharing sir

[@TREADExcellence]

I am glad you liked it.

[@gnanasubramaniamgnanachand9522]

high quality video, and highly informative. thk u sir.

[@TREADExcellence]

Glad you liked it

[@ungkunorani7735]

Thank you, this is very clear presentation. I have questions; 1. How do I conduct reliability for pilot testings? Am I to prepare a likert scale questionnaire set for the respondents for the pilot test for each question in my questionnaires? 2. How many respondents is sufficient to conduct the reliability and validity for pilot test study? 3. Wha should I do is the questionnaire set is unacceptable or poor?

[@TREADExcellence]

Thank you so much for your likeness. Here are answers of your questions: 1. Reliability analysis for actual data and for pilot testing are same. For pilot testing reliability you can follow the guidelines given in this video. 2. Minimum 50 to 60 participants are acceptable for conducting reliability analysis. While validity depends which type of validity is to conduct. Validity assessment from experts does not require any prior data.

[@dr.muhammadnaveed4136]

Good

[@TREADExcellence]

Thanks

[@missmoody7409]

My all variables reliability alpha cronpach's is. 935. So how can i write in interpretation kindly guide me.

[@TREADExcellence]

It shows you have very good reliability. You can report, the reliability of the instrument was excellent as the cronbach alpha value was more than .90 which shows good reliability estimations for this instrument

[@missmoody7409]

@@TREADExcellence thank you so much. ❤️

[@Hairprincess1.1]

hello, if cronbach alpha reliability value is .85 for a scale, is it correct to say the 85% of the variance is good variance, with 15% error variance?

[@TREADExcellence]

NO. If reliability coefficient is 0.85 then (0.85)^2 = 72%, which means this instrument is 72% consistent and it will produce 72% similar measures which indicates quit good reliability.

[@Hairprincess1.1]

@@TREADExcellence okay thank you for responding and for providing me with the equation for figure it out. i really appreciate it :)

[@Hairprincess1.1]

@@TREADExcellence oh also, for that example, 72-100 = 28. Does 28% represent error variance ? thanks

[@TREADExcellence]

@@Hairprincess1.1 Yes