In working with psychometric instruments, we are always very concerned about the reliability of the test. There are several types of reliability:
a) Test-retest
b) Alternate form
c) Internal consistency
d) Inter-item consistency
e) Profile reliability
Many assessment results are reported with a "standard error of measurement" - this recognizes that, if the test was taken again by the same participant, under identical circumstances, the results would likely be a little bit different.
Can you share some of your findings about the reliability of various tests and to discuss some of your cautions/concerns/considerations about this topic?