My son has been having trouble concentrating, on both simple and complex tasks where he had no problems before. He approaches objectives with hesitation and anxiety and is frustrated with his current state.
When it comes to learning, my son does extremely well with visual and oral stimuli. He's always said that he learns more from watching television than at school. He just absorbs what he sees and hears.
Of recent, his inability to concentrate and accomplish tasks has led to depression (or vice versa, we won't really know until his medication takes effect).