Y= [rxy Sy(IQ -x)] ÷ [y Sx]
where
Y = the expected achievement score for a given IQ score
rxy = the IQ – achievement score correlation
Sy = the standard deviation of the achievement scores
x = the mean IQ
Sx = the standard deviation of the IQ scores
y = the mean achievement standard score
SDy√ (1-rxy2)
Where:
SDy = the standard deviation of all of the achievement scores
r
xy
= the IQ-achievement score correlation (use .62)
So considering I have no idea what any of this means I can guarantee that no one in the district does. There is a handy chart but it only goes to 129. It probably doesn't matter anyway because I don't think they are legally obligated to provide services if achievement is at grade level. They could write an IEP but don't have to.
polarbear--basically what they are doing is giving each kid a cookie-cutter eval (if they bother to evaluate at all), and they do the CogAT and certain portions of the WJ-achievement for everyone. So for DD all they were going to do was the WJ writing cluster and use her outside WISC scores. If we hadn't had the WISC they probably would have dug up her old CogAT scores or did it over again. Then the OT was going to do a test or two like the Beery VMI and that was baiscally it. Anything else they consider "neuropsych testing" even though the State has an entire list of suggested tests, given whatever the concern is, including a lot of tests for information processing. Our district considers all of those tests "neuropsych tests". The special ed director refuses to answer any of my questions. I don't think the district even owns any tests besides the CogAT and the WJ-Achievement and the WIAT. They do own the WISC but don't use it. I just can't get over how sloppy they are and I want to report it to the superintendent, calling it a district-wide system failure, but I know he will be clueless and not even know what I'm talking about. It's probably pointless.
