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Why Physics Envy will Persist in Political Science

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PCA or EFA (Principal Axis Factoring) to purify my scale ? 5 Replies

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Comment by Shyh-Mee Tan on December 15, 2010 at 8:41

Dear all,

I have done my FA. I have listed out my factors and attributes. I guess my analysis stop here. 


Thanks for the discussions.


Comment by Sunny Bose on December 15, 2010 at 8:14

Dear Shyth- mee Tan .... reading the discussion you had with the co researchers and your problem, what I feel is that you need to do the confirmatory factor analysis now. For this you need your factor structure from the EFA. Now based on the EFA factor structure you have to draw the relationship of the individual attributes with the dimensions and the dimensions with the construct. This will confirm whether the attributes and the latent factors actually represent your construct.

For this purpose, you can use amos. You will get a trial version for free download. Go for a google search on amos free download and you can download it.

Comment by Francisco López de Ipiña on December 15, 2010 at 4:08

Dear Shyth-Mee Tan, I agree with Dr. Prabhakar comment on October 19, 2010 at 2:53am. There are some statistical software packages to do it, my prefer is R language... it's free... I suppose you know that factors aren't a unique solution and the optimal interpretation is catched up after factors rotation.

Comment by Shyh-Mee Tan on October 19, 2010 at 3:09
Dear Kerry,

from my FA, I just want to confirm 'those variables' from my literature review are the factors affecting the implementations.Little green book by Jae-On Kim and Charles W. Mueller?
Thanks. SM
Comment by Shyh-Mee Tan on October 19, 2010 at 3:05
Dear all,

I shall look into it. Thanks for all the answers.
Comment by Krishamurthy Prabhakar on October 19, 2010 at 2:55
Dear Shyh -Mee Tan, I have given an article on the question you have asked. Please tell me if it is useful. I use it for my students.
Comment by Krishamurthy Prabhakar on October 19, 2010 at 2:54
Comment by Krishamurthy Prabhakar on October 19, 2010 at 2:53
Dear Shyh-Mee Tan, Greetings. My suggestion is to go with exploratory factor analysis. You can identify the latent variables. Once you identify the latent variables, if you develop a model and want to confirm how the model fits the data you can use confirmatory factor analysis. This way you can obtain better insights.
Yours sincerely,
Comment by Kerry MacQuarrie on October 19, 2010 at 2:50
There is a book in Sage's Quantitative Applications in Social Sciences (the slim green, paperbook series) on factor analysis, which is a good introduction to factor analysis. As you read, you may want to think about whether there is any strong theory in your field as to how components in your factor analysis might relate to one another/the underlying concept. I don't think anyone here can give you an authoritative answer on CFA vs EFA without knowing a lot more about how you plan to use factor analysis and what your research question is.
Comment by Shyh-Mee Tan on October 19, 2010 at 2:31
Dear friends,
One of my research questions is to determine the factors affecting the implementation of information literacy in schools. How do I do factor analysis? Do I do an exploratory factor analysis which analyzes all the variables in my questionnaires? or Do I do a confirmatory factor analysis which analyzes only the variables/ factors from my literature review? Can anyone help me with this?

Thanks n regards,
shyh mee

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