Discrimination of direction of movements in pigeons following previous experience of motion/static discrimination.

Researchers worked with pigeons to see if easier training first helps birds learn a harder task later. Birds in the history group first learned to peck when dots moved instead of staying still. Next, all birds had to learn which of two directions the dots were moving.

The team timed how fast each bird reached a large share correct choices. They compared birds with the easy motion training to birds that started cold on the hard task.

Pigeons that first practiced motion vs. static reached the mastery mark in about half the sessions. Naïve birds needed roughly twice as long to hit the same accuracy.

In plain words, a quick warm-up on an easy discrimination sped up learning the tricky one.

Okouchi et al. (2006) extends the idea. They showed that even the rate of past reinforcement—not just what the bird saw—can later change how fast pigeons respond on fixed-interval schedules. Together, the two papers say "history matters" in different ways.

Dove et al. (1974) used a similar method. Birds first lived under a fixed-ratio schedule, then switched to fixed-time food. The earlier ratio history reshaped their timing pattern, echoing how motion history reshaped discrimination here.

Polo-López et al. (2014) tested children, not birds, but asked a parallel question. Simple-sample conditional training sometimes sped up later complex auditory-visual relations. Mixed results in kids remind us that the "easy-first" trick helps, yet may not work for every learner or every task.

If you run stimulus-trainings, start with an easy, clear version of the target skill. Let the learner master "motion vs. still" before you ask for finer details like direction, color, or shape. This low-cost sequencing can cut your teaching time in half and reduce errors, especially when you jump from simple receptive labels to conditional discriminations or intraverbals.