Fixed-interval schedule: In psychology, the term fixed-interval schedule is described as a particular schedule of reinforcement which is often considered as a part of the operant conditioning theory and is developed by B. F. Skinner.
A fixed-interval reinforcement schedule is defined as the phenomenon in which the very first response is being rewarded after every specified time that has been elapsed or passed.
In the question above, the given statement signifies the fixed-interval schedule of reinforcement.
