ADJUSTING FIXED-RATIO SCHEDULES IN THE SQUIRREL MONKEY.

Scientists worked with squirrel monkeys on a fixed-ratio schedule. They let the computer watch how long the monkey paused before starting each ratio.

If the pause was short, the computer raised the ratio for the next set. If the pause was long, it lowered the ratio. The drug meprobamate was also tested to see if it changed pause length.

The system worked. Pause length reliably controlled the next ratio size. Short pauses led to bigger ratios. Long pauses led to smaller ratios.

When the monkeys got meprobamate, their pauses became shorter. The drug seemed to speed up their start times.

Mullane et al. (2017) later showed that children, like monkeys, prefer schedules that start with a tiny ratio. Their kids picked a mixed 1,9 ratio over a fixed 5. This extends the monkey finding to humans in classrooms.

James et al. (1981) found that brief stimuli can actually lengthen pauses in pigeons. This seems opposite to the current study, but the difference is control: T et al. used pause length to control the schedule, while L et al. just added extra stimuli. The pause is key.

Bryant et al. (1984) showed pigeons prefer schedules with smaller initial ratios. This supports the idea that starting easy keeps responding strong, matching the monkey data where short pauses (quick starts) led to bigger next ratios.

You can program reinforcement schedules that self-adjust. Track how long your learner waits before starting a task. If they jump right in, raise the response requirement next time. If they hesitate, drop it. This keeps work smooth without you guessing numbers. Try it with token boards or math sheets next week.