Our school does the computerized test so it's not just about bubbles. The child has to be mature enough to concentrate on a test for as long as it takes to complete. Older children typically have longer attention spans. Also, from what I understand, the proctor administers each question and then waits for each child who is testing to select their answer to move on to the next one. I can see how this would be distracting for some kids, especially for those who answer quickly.
From third grade on, they work through the test on their own within the specified time limit.
That's an interesting point. With any group test I suppose there would be some kind of distraction or pressure to finish when everyone else does. Individual testing would be best, but I don't see that as a possibility in my school district. We have suggested, though, that there be additional testing for those that ceiling any screening test.
