Variables affecting establishment of schedule-induced attack on pictorial targets in White King pigeons.

Researchers worked with 17 White King pigeons. Each bird got food on a fixed-time schedule. A picture of another pigeon appeared only after the schedule was running.

The team wanted to see if the birds would peck or attack the photo. They counted strikes at the picture during 30-minute sessions.

Fourteen of the 17 birds started hitting the photo. Attack stayed high across sessions. The late arrival of the picture, not just the food schedule, triggered the fighting.

This shows schedule-induced attack is real and repeatable. A simple picture of a peer can spark aggression after food cycles begin.

Davison et al. (1991) also saw pigeons peck even when the peck canceled food. Both studies show schedule-controlled responses that go beyond getting the reinforcer.

Kelly (1974) found monkeys developed their own response styles under random-ratio schedules. Like Rogers-Warren et al. (1976), the schedule set the stage, but individual history shaped the final form.

Michael (1974) proved stimulus value flips with schedule context. Here, the pigeon photo gains attack power only after the food context is locked in. Timing of stimuli matters as much as the stimuli themselves.

You can trigger new topographies by adding or moving stimuli mid-program. If a client shows sudden problem behavior, check when new people, pictures, or toys entered the space. Shift them earlier or later in the routine to test if the timing calms the response.