Question

1. what is a ratio reinforcement schedule?

varies randomly with each response.
reinforcement after time intervals.
reinforcement after a set number of responses.
always occurs at the same time.

Explanation:

A ratio reinforcement schedule in operant conditioning is defined by delivering reinforcement based on the number of responses made by the subject, not the passage of time. The correct option matches this core definition, while the other options describe interval schedules (time-based) or incorrect random/time-fixed patterns.

Answer:

Reinforcement after a set number of responses.