Adaptive tests can provide uniformly precise scores for most test-takers. In contrast, standard fixed tests almost always provide the best precision for test-taker's of medium ability and increasingly poorer precision for test-takers with more extreme test scores.
An adaptive test can typically be shortened by 60% and still maintain a higher level of precision than a fixed version. This translates into a time savings for the test-taker. Test-takers do not waste their time attempting items that are too hard or trivially easy.
Like any computer-based test, adaptive tests may show results immediately after testing.