Issues with fine motor, eyesight, and coordination can absolutely impact everyday ability to demonstrate intellect. They can make it hard to read, hard to write, hard to complete puzzles, hard to estimate or evaluate size, number, distance, etc., which can impact math achievement and number sense - the impacts are wide ranging. Addressing these issues with appropriate therapies and getting appropriate accommodations in the meantime can make a huge difference in confidence, self-esteem, and achievement. It is very easy for a child who has difficulties in these areas to internalize a view of himself as stupid because he has difficulties with tasks that other children find simple.
