How early? And what kind of scores? The 11+ in the UK was extremely reliable -- and it was possible to get an education later if one really wanted to (and cou

How early? And what kind of scores? The 11+ in the UK was extremely reliable -- and it was possible to get an education later if one really wanted to (and could find the time). The 11+ was basically an IQ test that didn't depend (much) on the curriculum. School grades and tests are much less reliable.