ECD becomes more helpful for redesigning tests. The fewer
constraints there are on the changes that can be made, the more
helpful ECD becomes. ECD is even more useful for making new tests
of previously measured constructs, and is most useful for measuring
new constructs. In fact, the less experience test developers have
measuring some domain, the more useful ECD becomes because it
helps to ensure that test developers will seek the information they
require about the domain to be tested, will clearly specify the claims
to be made about test takers, will determine the evidence required
to back the claims, will develop tasks that provide the desired
evidence, and will score them appropriately.