I can come up with two ways:
The first is that the testing done at age 6 often doesn't test some of the higher level phonological processing, so it only crops up at an older age when the normed expectations are higher. A highly gifted child can brute force some of the lower level skills with a strong memory and above-level reading skills. Stealth dyslexia would fall in here.
The second, and what I suspect was the case for my DD, a child well above level not instructed at that level fails to develop the encoding/decoding skills. In DD's case, her reading instruction was all focused on decoding well within her automatic reading level, which meant she learned little of the higher phonological skills, and she forgot the early skills, reading entirely through sight recognition.
DD was diagnosed at 9, and now at 11 is about to get herself undiagnosed after remediation.
Last edited by geofizz; 10/15/13 09:13 PM.
