Effects of punishing elements of a simple instrumental-consummatory response chain.

Rats first learned a two-step chain: press a lever, then drink sugar water.

Next the researcher added a brief electric shock. Shock came right after the lever press for some rats, right after drinking for others.

The team watched which link slowed down and how long the whole chain took.

Shock cut the number of chains, but not by stopping rats mid-way.

Instead, rats waited longer before touching the lever. Once they started, they still ran the full chain.

Punishing either link had the same effect: the whole sequence started later.

Reynolds (1968) showed that delayed shock needs higher intensity to work. The new study kept shock immediate, so the drop in responding came from chain structure, not weak timing.

Kuhn et al. (2006) later tested kids with disabilities. They also saw the first link weaken most when they used extinction instead of punishment.

Dunham (1972) looks like a contradiction: shocking drinking made rats run more, not less. The key difference is independence. In J’s setup running and drinking were separate options; here the responses were chained, so slowing the first link froze the whole line.

Harris et al. (1973) ran a similar rat study the same year. They also found that shock hit only the targeted act and recovery was quick once shock stopped.

If you punish any step in a behavior chain, expect the client to hesitate at the very first move. Plan extra prompts or priming for that first response. When possible, break long chains into separate, independent responses so punishment does not stall the entire routine.