Experiment 1 Environments (IMAGE) University of Pennsylvania Caption In the first experiment, two objects always appeared in the same position relative to the room's boundary; the other two always appeared in the same spot relative to another object acting as a landmark. This image shows the boundary wall and a landmark object. Credit University of Pennsylvania Usage Restrictions Must credit the university. 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.