Cronbach's Alpha - SPSS (part 2)

Conduct and interpret an internal consistency reliability analysis through Cronbach's alpha, the corrected item-total correlations and the inter-item correlation matrix. Guidelines for identifying adequate levels of reliability are also provided.

http://how2stats.blogspot.com/2011/09/internal-consistency-reliability.html
http://how2stats.blogspot.com/2011/09/internal-consistency-reliability.html

Category:

Education

Tags:

• tutorial
• SPSS
• Cronbach's alpha
• reliabilty
• alpha reliability test

[how2stats]

usually, there is not a lot you can do, except admit that your scale is not internally consistent enough to interpret meaningfully. Sometimes you can drop more than one item to enhance Cronbach's alpha, but not often. If you are knowledgeable enough, you could try analysing polychoric correlations or tetrachortic correlations rather than Pearson correlations, depending on how your items are scored. I haven't covered that yet. Perhaps google will help you find something.

[usmanisah]

Hi Thanks for tutorials, really interesting and informative. I have learnt a lot. You said at the end of ur video that you were going to provide some references on Cronchbach's Alpha but I couldn't find it.. Please could you provide some if you can, thanks.

[how2stats]

@usmanisah

The link to the webpage with the references I mention is in the summary of the video; check underneath the video and then press the downward arrow to expand the area; the link will become visible. Youtube won't let me post the link in this response, unfortunately.

[how2stats]

Thanks for the suggestion, dc78. MLM is a pretty specific type of analysis (I never come across them expect in the context of education research), but I imagine I'll get around to it eventually. If you come across a really interesting empirical study that has used MLM, perhaps you could send it to me.

[Cloudeater90]

Helped a lot! Thanks.

[cacaupereba]

Thank you very much for this. Actually much better than any presential statistics class I ever had! Thank you again!

[psyhousejunkie]

very helpful..thank you

[sesukaku1]

The video is very helpful, but next time when you make a video tutorial can you please breathe more gently? or i guess getting a mic with some filter will help to reduce the breathing sound. Also take your time to speak so that you can breathe more calmly. It feels like you are having an asthma or sthng (sorry no hard feelings, it's just my perception of it). Anyways, its a great and useful tutorial. Thanks for posting.

[WardahAly]

@how2stats Thanks :)

[888Murf]

@WardahAly when you've got an alpha that's lower than you'd like to see...you've got to revisit the item set and look to rebuild or refine it with the aim of improvement. No?

[WardahAly]

thanks for your guidance.... One question that bothering me is.... your cronbach is .650 and as per the table furtuer below, deleting any of the data wont make it <7, 8, 9 .... now what can be done to get the required cronbach alpha???