The internal consistency of the scale is high, as is the two-week test-retest reliability.

Some studies have found strong support for construct validity, internal consistency, and test-retest reliability, although variation was observed.

In doing this, each scale forms a unidimensional construct, demonstrating good test-retest reliability.

They reported a favorable analysis in terms of internal consistency, test-retest reliability, and concurrent validity.

Additionally, the test-retest reliability is very poor and generally unstable for participants who are younger than 8 years of age.

Very high test-retest reliability would be bad, since it would suggest that you were not picking up on these changes.

Consistency over repeated measures of the same test can be assessed with the Pearson correlation coefficient, and is often called test-retest reliability.

One study provided some evidence for the test-retest reliability and predictive validity.

Also, test-retest reliability is sensitive to the time between tests.

High test-retest reliability is good, because it proves that the data collected from the study is consistent.