What type of reinforcement may occur after a worker's performance is evaluated over a fixed time period?

The correct answer is Fixed Interval reinforcement. This type involves providing a reward or reinforcement after a set period of time, which encourages behavior to occur regularly but only at certain intervals. In a workplace setting, if an employee's performance is evaluated at consistent, predetermined intervals—such as weekly, monthly, or quarterly—this would lead to the reinforcement being provided at those specific times, hence fitting the definition of Fixed Interval.

This is particularly relevant in settings where performance reviews or evaluations lead to bonuses or other rewards being issued after a defined timeframe rather than after every individual performance or effort. Understanding this concept helps in recognizing how scheduled evaluations can motivate employees to maintain consistent performance over time, knowing they will receive feedback and potential rewards at regular intervals.