Reduction of shock frequency as reinforcement for avoidance behavior.

SIDMAN (1962) built a two-lever box for rats. One lever did nothing. The other cut how many shocks the rat got each hour.

The team watched if rats learned to press the cut-shock lever. They never said how big the drop was or how many rats they ran.

Rats worked the lever that lowered shock density. The paper says this drop, not total shocks, kept the lever pressing alive.

No numbers were given, so we cannot tell how strong the effect was.

Gardner et al. (1976) and Lewis et al. (1976) ran almost the same box, but shocks stayed the same or even went up. Rats still pressed hard. These studies say delay alone can drive avoidance, so density reduction is not required.

Baum (2020) goes further. He says the rat is not "reinforced" at all. The shock itself pushes the lever press, like a reflex.

Wheatley et al. (1978) keeps the density idea but shows it obeys the matching law. Pigeons spread their key pecks in line with how much shock-free time each key gave.

When you write an escape plan, ask what the client really gets. Is it fewer demands, a short break, or just a later start? The rat data say any of these can work. If behavior keeps going even when total work stays the same, look at timing, not just count. Try adding a small delay before the hard task and see if that alone cuts problem behavior.