All In The Eyes: What The Pupils Tells Us About Language

"The meaning of a word is enough to trigger a reaction in our pupil: when we read or hear a word with a meaning associated with luminosity ('sun,' 'shine,' etc.), our pupils contract as they would if they were actually exposed to greater luminosity. And the opposite occurs with a word associated with darkness ('night,' 'gloom,' etc.). These results open up a new avenue for better understanding how our brain processes language."