3 random guesses: - most objects are larger than letters - the details of most objects are less relevant than with lettering - you can spend more time recogn

3 random guesses: - most objects are larger than letters - the details of most objects are less relevant than with lettering - you can spend more time recognising each thing, whatever it is, without slowing yourself down so much that the task becomes intractable (when reading, you have to recognise, and correctly, a lot of letters per minute)