Surely growth measures require repeated testing (so one can see how the differences between student at Time A vs. Time B), not necessarily adaptive tests? Maybe I'm missing something; could you help me understand?
I'm abstract, you're correct, and a typical setup for an educational experiment is a calibrated pre / post test to see what changed over the course of interacting with an activity. Both tests are effectively identical and measure the same thing.
However, state tests are annual. You don't want to measure the same thing. If you don't measure the same thing, you can't compare.
There are technically non-adaptive test designs which might work, but it's not what we're using, and they're a lot more complex than adaptive.
