As a nitpick, if I recall correctly, "negative reinforcement" is when you remove a desirable stimulus to reinforce behavior. In this case it's actually "positiv

As a nitpick, if I recall correctly, "negative reinforcement" is when you remove a desirable stimulus to reinforce behavior. In this case it's actually "positive punishment" as they are introducing an aversive stimulus to extinguish some behavior (go out of bounds). https://www.verywellmind.com/what-is-punishment-2795413 https://www.verywellmind.com/what-is-punishment-2795413