General activity as instrumental: application to avoidance training.

GRAF et al. (1963) let pigeons move freely in a small box. No lever, no key. The birds could hop, turn, or flap.

Every 5 seconds a mild shock came unless the bird moved enough to trip a floor switch. A light blinked 2 seconds before each shock. The team tracked how the warning light changed the birds’ general activity.

The pigeons quickly learned to stay busy. When the warning light came on, their movement pattern flipped. They shifted from steady motion to short, timed bursts right after the signal.

The study shows that even free movement can be shaped by Sidman avoidance. Warning stimuli act like a countdown timer, not an on-off switch.

BOLLEHOFFMAN et al. (1964) built on this work. They proved that pigeons need instant feedback—like a click or brief blackout—to lock the avoidance response in place. V’s birds had no added feedback, yet they still learned, suggesting motion itself can supply the cue.

THOMAS et al. (1963) ran the same schedule with goldfish. Fish also redistributed their crossings when a warning lamp appeared, showing the warning effect holds across species.

Thomas (1968) later removed all shocks. Avoidance died fast, even when the warning light stayed on. Together these papers tell us: warning stimuli guide timing, but they cannot keep the behavior alive without the underlying shock postponement.

You now know that clients don’t need a rigid lever or keypad to learn avoidance. Any measurable movement—tapping a table, rocking, pacing—can enter the contingency. If you add a brief neutral cue two seconds before a demand or mild aversive event, you may see the movement cluster right after the cue. Use that timing to shape safer or more functional responses, and remember to fade the aversive event later so the behavior doesn’t stick around forever.