Visual perception in general involves areas on both sides of the brain. That is something different. Lexical processing is a step on the way toward comprehension. This question refers to research comparing different groups of students, probably in English classes, who were working on papers. No, this seldom happens in research or in real life.
Good writers are more likely to manipulate the overall structure of a piece of writing.
The subject being tested must keep a flexible metal wand on the dot. This is a way to measure motor coordination or motor learning. No, that would be more typical of a cognitive psychologist with interests in computer simulations. The term neuroscience implies a biological emphasis. Examples would be knowledge of how to play chess, or how to fix car engines.