A new technique for measuring thermoregulatory behavior in the rat.

The team built a two-lever box for rats. One lever made the air warmer. The other made it cooler.

Rats had to press back and forth to keep the room close to their own body heat. The box tracked every press and the temperature second by second.

The rats quickly learned the game. They pressed to hold the chamber within a few degrees of normal rat temperature.

Their lever presses formed a steady see-saw pattern, showing real-time control of the heat around them.

ELLIOTT et al. (1962) did the same kind of tracking seven years earlier, but with cats and sound. The cats took longer to catch on until brief light pauses were added after each press. W et al. kept the pause idea and moved it to temperature, proving the method works across senses and species.

CHARNEY et al. (1965) showed monkeys can tell when their own stomach is stretched and use that feeling as a cue to press a lever. W et al. stretch the idea further: rats can use an outside cue—air temperature—to guide pressing. Together they show operant control works for both inside and outside stimuli.

O'connell (1979) later used the same rat-lever setup, but with food omission instead of heat. Both studies show the rat lever box is a flexible tool; swap the consequence and you get a new behavior lesson.

You now have a proven way to turn any sense—heat, sound, even stretch—into a teaching cue. If you run animal labs, copy the two-lever tracking setup to study self-control in real time. If you work with humans, think temperature feedback as a reinforcer: could a client earn a warmer room for on-task behavior? The study reminds us that consequences don’t have to be candy or praise; they can be the comfort of a few degrees.