The small white cylinder with wires, next to the rat, (an average adult male Sprague-Dawley), is a telemetric implant, a device that allows physiological recording from freely moving animals. The whole device goes inside the animals, and there are no wires connecting the animal to the recording equipment. All of the data is sent by a radio trasmitter within the cylinder, so the animal is free to behave normally. Installing of such a device is a fairly new technique used to assess multiple physiological parameters in behaving animals. This particlar device allows researchers to monitor penile pressure and brain waves without having to disturb the animal. The sheets of paper that the rat is standing on are actual data collected via telemetry and analyzed on the dedicated computer system that is part of the telemetry-acquisistion hardware in the laboratory of Dale Sengelaub, Professor of Psychology, Indiana University Bloomington.