DD's processing speed was around 93 with working memory over 30 points higher (but processing speed and working memory were both lower than PRI and VCI). It meant that her GAI is a lot higher than FSIQ. She does have ADHD, and the slow processing speed does show up in school (she is usually one of the last to get things done). She tends to be meticulous with her work and doesn't make many errors, which slows her down, but I also suspect handwriting is an issue for her, in that she is slower than normal.
