Find the Anomaly (IMAGE) Brown University Caption Test subjects were asked to find a group of diagonal lines against an obscuring background of lines. Their sleeping brainwaves before and after the task were compared with their performance of the task. Sleep appeared to help visual learning. Credit Watanabe lab/Brown University Usage Restrictions with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.