AB2371 it’s the Weschler Adult Intelligence Scale. It takes about two hours to administer. There are something like 15 tests and they increase in difficulty as you succeed in each one. The teat itself is used to assess knowledge, or as is commonly said, determine IQ. If you are an adult the theory is that your IQ is generally stable, so improving your IQ so to speak might not even be possible. I don’t know about test-retest reliability - I haven’t looked into that.