Every time an employee gets a paycheck after a predetermined period of time, he/she is being reinforced on a:

The correct answer is fixed interval schedule. It is because this is the most common schedule by which employees or workers are likely to be rewarded after being able to work for a specific or a certain amount of time. By this, every time the employee was able to receive their paycheck, it is likely that he or she is reinforcing a fixed interval schedule.

fixed interval schedule

Explanation: for every time an employee is given a paycheck after a specific duration of time (predetermined), that employee is being reinforced on fixed interval schedule. The fixed interval schedule is one such that workers are rewarded after a certain length of time, say weekly, or monthly etc. The length of time between reinforcement periods always stay the same. This is usually the most common way by which workers are rewarded.

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