What did the professor want to know from his tests? He wanted know ______.

A university professor recently made several tests with different animals to find out which was the most clever. He found out that the monkey was cleverer than the other animals he studied.
   In one test the professor put a monkey in a room where there were several small boxes. Some boxes were inside other boxes. Inside one small box was some food. The professor wanted to watch the monkey and find out how long it would take the monkey to find the food. The professor left the room. He waited a few minutes outside the door. Then he got down on his knees and put his eye to the keyhole. What did he see? To his surprise, he found himself looking into the eye of the monkey. The monkey was on the other side of the door looking at the professor through the keyhole, checking to see if the professor had really left!
Q11. What did the professor want to know from his tests?