Originally Posted by indigo
Originally Posted by Mr and Mrs P
What could cause such a drastic drop from the WISC IV in September 2014 to the Woodcock Johnson last week?
A few possibilities may be found in this old thread, How much error can there be in test scores?

I read this thread, thank you! One question I had....the WISC IV was conducted by a Masters level tester under the supervision of a Psy D. The Psy D scored the test. the WJ was conducted by a M Ed and Ed S degreed person. She typically works with kids on the other end of the IQ scale, so I don't think she has much experience working with GT. The tester for the WJ left the room at one point to obtain another test commenting that it wasn't a test that she used much. Does that make a difference in the results?