The purpose of the video camera was to capture the activity level of the rats following a high protein meal. Once the rats had ingested the food, the...

The purpose of the video camera was to capture the activity level of the rats following a high protein meal. Once the rats had ingested the food, the camera began filming. Dr. Aronson noted that when the camera was on, a bright camera light flooded the cage. He suspected that the research had been tainted by _______________.