What is a good convergent validity score?
Convergent validity is usually accomplished by demonstrating a correlation between the two measures, although it’s rare that any two measures will be perfectly convergent. Convergent validity is sometimes claimed if the correlation coefficient is above . 50, although it’s usually recommended at above . 70.
What is a good discriminant validity score?
Although there is no standard value for discriminant validity, a result less than 0.85 suggests that discriminant validity likely exists between the two scales. Consider researchers developing a new scale designed to measure narcissism. They may want to show discriminant validity with a scale measuring self-esteem.
How is discriminant validity measured?
In order to establish discriminant validity there is need for an appropriate AVE (Average Variance Extracted) analysis. In an AVE analysis, we test to see if the square root of every AVE value belonging to each latent construct is much larger than any correlation among any pair of latent constructs.
How do you evaluate convergent validity?
Convergent validity can be estimated using correlation coefficients. A successful evaluation of convergent validity shows that a test of a concept is highly correlated with other tests designed to measure theoretically similar concepts.
How to establish the discriminant validity of a measure?
To establish discriminant validity, you need to show that measures that should not be related are in reality not related. In the figure below, we again see four measures (each is an item on a scale). Here, however, two of the items are thought to reflect the construct of self esteem while the other two are thought to reflect locus of control.
Which is better, convergent validity or discriminant validity?
Instead of viewing convergent and discriminant validity as differences of kind, pattern matching views them as differences in degree. This seems a more reasonable idea, and helps us avoid the problem of how high or low correlations need to be to say that we’ve established convergence or discrimination.
When do you have convergent and discriminant evidence?
The important thing to recognize is that they work together – if you can demonstrate that you have evidence for both convergent and discriminant validity, then you’ve by definition demonstrated that you have evidence for construct validity. But, neither one alone is sufficient for establishing construct validity.
Is the validity coefficient the same as the correlation coefficient?
The possible range of the validity coefficient is the same as other correlation coefficients (0 to 1) and so, in general, validity coefficients tend not to be that strong; this means that other tests are usually required. It’s not unusual for validity coefficients to max out at around .