Associative interaction: joint control of key pecking by stimulus-reinforcer and response-reinforcer relationships.

Researchers worked with pigeons in a small lab box.

Each bird had one key to peck.

The team changed two things at once.

First, they changed which lights meant food was coming.

Second, they changed how many pecks earned food.

They watched which factor controlled the bird's pecking more.

Both factors mattered, but not at the same time.

When the light-food link was strong, peck rate followed the light.

When the peck-food link was strong, peck rate followed the work rule.

Each factor only took over when the other was weak.

The birds did not add the two sources together.

They switched between them like a seesaw.

Tager-Flusberg (1981) later showed the same birds could separate two types of pecking.

One type was triggered by brief food signals.

The other type was driven by work rules.

This supports G et al.'s idea that stimulus and response factors compete.

THOMAS et al. (1963) taught birds delayed matching by building skills step by step.

Their work laid the ground for testing how different controls mix.

Paul (1983) went further.

That team showed even the work rule itself can act like a signal.

This extends G et al.'s joint control idea into matching-to-sample tasks.

When you set up a program, check both the signal power and the work rule.

If a child ignores your SD,, maybe the reinforcement schedule is too rich.

If the child only works for the reward, maybe the signal is too weak.

Balance the two levers instead of cranking just one.