Another reason I don't like to share...really with anyone...is that scores are so imperfect. The kid testing 148 could really be 173, 148 or 142. There is too much variability in the testing process, and it's an imperfect science at best.
Also, most people really understand very little about the tests and about statistics. They may not understand there are different tests. They may not understand what standard deviations are. They may not know contemporary numbers are on a scale that doesn't go as high as older tests. They may not understand that the same child might get a very different number on a different day or on a different test.
So I'm thinking part of when it is appropriate to give that information to a child is when they are prepared to understand statistics and IQ testing to know what the information they are being given actually means and what it doesn't.
