Interhemispheric transfer of lever pressing as stimulus generalization of the effects of spreading depression.

Scientists trained rats to press a lever for food. They then created a brain state called spreading depression on one side of the brain. The team wanted to know if one single food reward would still make the rat press the lever when the brain state changed.

They watched how often the rat pressed after the brain shift. The test showed whether the rat treated the new brain state as if it were the old one.

One food reward was enough. The rat kept pressing the lever even after the brain state changed. The team called this strong stimulus generalization.

Plant et al. (2007) moved the idea into a classroom. They gave students a goal statement and a small picture that stayed the same in both training and test rooms. Academic work moved smoothly to the new room, just like the rat press moved to the new brain state.

Fisher et al. (2004) added a twist in a martial-arts gym. They used praise and brief extinction during drills. The new kicks showed up later in live sparring. Again, one setting fed another, but now with athletic skills instead of brain states.

Tantam et al. (1993) went further. They built equivalence classes with words and shapes. After training one item, untrained items in the same class controlled responding. The 1967 rat study showed generalization across brain states; the 1993 study showed generalization across symbolic relations.

You now know that even a single reinforcer can lock in transfer. Use this power when you switch rooms, staff, or materials. Give one sure reward right after the change. The learner will treat the new setup like the old one and keep the skill alive.