Bug Search and Cancellation are about equally weighted for fine motor skills, as they both consist of stamping as a response (they use an ink dauber, kind of like a bingo stamp). OPs DD scored exceedingly well on Cancellation, which suggests that whatever affected Bug Search was probably not fine motor.
Picture Memory and Picture Concepts (as well as Cancellation) use pictures of concrete-familiar objects, which allows some verbal mediation. Notice she did a lot better on the working memory task that allowed for some verbal mediation (Picture Memory) than she did on the spatial memory task (Zoo Locations). Likewise, in fluid reasoning, Picture Concepts, which allows verbal mediation, was much better than Matrix Reasoning, which is usually more abstract.
So my hypothesis would be that some of the variation in other indices is still related to the VCI > VSI split. Hence my speculation about NVLD.
