The psychologists used eye-tracking experiments to test their idea. They measured eye movements with a camera that records 1,000 images per second. Participants in their study were given objects to look at, but unbeknownst to them, some objects were changed during eye movement. The aim was to cause the participants to learn new connections between impressions from inside and outside the fovea—detailed and coarse impressions. That learning indeed happened, according to the investigators, and in just a few minutes.