Bill T.P. posted on Friday, April 17, 2015 - 10:29 pm
In calculating the composite reliability, we start with summing all standardized coefficients for each factor. What if the signs of some of them are negative? Do we have to use the absolute values, or the native negative ones?
I am thinking that you want the reliability of a sum of items so that an increase in the sum reflects an increase in an underlying construct. Applying the omega formula you would sum loadings that are positive and negative which is not good. If you don't think a negative loading is substantively meaningful I would delete it, but if you think a negative loading is substantively meaningful, I would reverse the item so the loading is positive. Which I guess is the same as using the absolute value.