...apparently depressed block design scores are a red flag for vision issues.
That's interesting. My dd has taken the WISC-IV twice, but not in a few years. Her block design scores (like all of the other scores) were erratic, but not technically "low." She got a 15 the first time and a 12 the second. Her two WISC GAIs were 99.9 and around the 98th, if I recall correctly. The second, much lower, GAI was due to the PRI index (which includes the block design) going down in the one year btwn the first testing and the second. Either way, she's gifted, but the varying scores were odd. Both times her VCI was in the 99th+(+), so HG+. I would expect a HG+ verbal kid to read more/better/like it more than she does, though.
