1
$\begingroup$

at the moment I'm evaluating a survey which contains some constructs with too high composite reliability values. The CR (composite reliability) values are above .95 which indicates redundant items. In consequence to this I nneed to reduce the CR because it is indicating that there are redundant items. I want to identify which items are redudant.

My question is: Is there a solid way to solve this problem?

$\endgroup$
  • $\begingroup$ Welcome to our site! Note that there is no need to give thanks on advance or sign your name at the bottom of a question. $\endgroup$ – Silverfish Sep 12 '16 at 8:16
  • $\begingroup$ Your final question is a little unclear - are you essentially asking "how can I decide which is redundant"? $\endgroup$ – Silverfish Sep 12 '16 at 8:17
  • $\begingroup$ Exactly this is the question. I need to reduce the CR because it is indicating that there are redundant items. I want to identify which items are redudant. $\endgroup$ – GR_ Sep 12 '16 at 8:21
  • $\begingroup$ Thanks - it might be a good idea to edit this into the question itself ("edit" button is just below your post) as not everyone reads the comments! $\endgroup$ – Silverfish Sep 12 '16 at 8:29
1
$\begingroup$

Items are redundant as a function of other items.

If I ask your height in inches, and your height in cm, one of them is redundant. Which one? Both, or neither. It doesn't matter which one you use, just pick one.

Are you trying to reduce the length of your scale? Typically shorter versions of scales are developed through validity methods, not reliability methods. However, I have never heard anyone worrying that their reliability is too high - you might worry that your scale is too long, but that (seems to be) the other side of the coin.

| cite | improve this answer | |
$\endgroup$
  • $\begingroup$ Thank you for your answer. I just wanted to ensure that there is not a technique that solve such problems. I think the core of my problem is to reduce the length of the scale. $\endgroup$ – GR_ Sep 13 '16 at 7:49
  • $\begingroup$ I would definitely think of your problem in terms of scale shortening. $\endgroup$ – Jeremy Miles Sep 13 '16 at 13:54

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.