Re: Alpha and mean inter item correlation

Posted by flint on Oct 23, 2012; 9:11pm
URL: http://spssx-discussion.165.s1.nabble.com/Alpha-and-mean-inter-item-correlation-tp5715788p5715807.html

Hi Rich
Thanks.

I did a t test to see if there are any changes.

I did a FA just to see whether d variables can go together before the t test. Initially I fed all 69 variables and the result was garbage. Didn't show anything coz of the large number of variables. A consultant suggested that I grouped the variables into themes. I did that, so there are about 3-5 variables in a theme. I ran that in FA. I thought it make sense coz the results make sense with the cronbach alpha either .7 or below that.

When I showed to my Sup, he said nope cannot b done that way coz i hAve grouped them. So I can't do a EFA. But the grouping was done using face validity. I am so confused.

Another question, inter item correlation, ok I do stage 1, I can roughly look at the items tat might b correlated. So do I used these items to do a factor analysis? Is that d reason? Asked my Sup, no answer at all. Feeling frustrated especially for a novice and trudging to make sense as to why I am doing this.

It did make sense for factor analysis but trying to make sense abt inter item correlation and after this, what should I do.

Sorry still need help

Flint