Aeh is the expert, and absolutely correct.
The OLSAT measures ability, in fact SAI stands for School Ability Index. The OLSAT is not considered an IQ test, it is a used as a group screener test that catches some kids who are gifted and children who are high achievers. That said, both my kids have tested HG and neither passed the OLSAT.
Scores on all tests can fluctuate based on how your child felt that day, if he/she was tired, if there were distractions during the test (the OLSAT is a group test) etc.
If you truly want to know if your child is gifted, I would suggest you have him tested with the WISC IV or V which would give you a much more accurate picture.
