Observing responses in pigeons: effects of schedule component duration and schedule value.

Researchers watched pigeons peck a key that turned on colored lights. These lights told the bird which schedule was running. The team changed how long each schedule lasted and how often food came. They wanted to see if these changes made the birds look at the lights more or less.

The birds worked under variable-interval schedules. Sometimes the food came fast. Sometimes it came slow. The sessions lasted from 30 seconds to 8 minutes.

The birds kept checking the lights no matter what. Short or long schedules made little difference. Rich or lean food rates also did not matter much. The birds' observing stayed high across almost all conditions.

This means schedule length and value alone do not control observing. Other factors must be at play.

Hirota (1974) ran the same setup one year later. They got the same weak effect. This direct replication shows the finding is solid.

Reiss et al. (1982) looked deeper. They found that shorter components can raise response rates, but only when paired with richer food. This extends Hymowitz (1973) by showing duration effects depend on the food rate, not on time itself.

Cohen et al. (1993) tested behavior momentum. They showed that richer schedules protect behavior from disruption. This helps explain why observing stayed high: the birds had built momentum that schedule tweaks could not break.

For you, this means schedule tweaks alone may not change client attention to cues. If a child keeps looking at the token board despite leaner rewards, look beyond the schedule. Check if rich history, stimulus salience, or other variables are keeping the observing alive.