What type of reinforcement is illustrated when Sara receives a dollar for completing a chore?

Positive reinforcement is demonstrated in this scenario where Sara receives a dollar for completing a chore. In behavioral psychology, positive reinforcement involves the introduction of a rewarding stimulus following a desired behavior, which in this case is completing the chore. The dollar acts as a positive reinforcement because it increases the likelihood that Sara will repeat the behavior of completing chores in the future, as it provides a desirable consequence.

This concept is fundamental in understanding how behaviors can be encouraged or strengthened through rewards, highlighting the importance of reinforcement in operant conditioning. The provision of a tangible reward, such as money, directly relates to the behavior performed, making it a clear example of positive reinforcement.