Final answer:
Gavin downloading a new workout song is an example of positive reinforcement, which is a psychological strategy to encourage desired behaviors with rewards. Self-serving bias is when people attribute successes internally and failures externally.
Step-by-step explanation:
Gavin downloads a new workout song every time he completes his week's exercise goal. This action is an example of a positive reinforcement strategy in psychology. Positive reinforcement is a technique used to encourage a desired behavior by offering a reward when that behavior is performed.Making internal attributions for your successes and making external attributions for your failures is an example of a self-serving bias. This cognitive bias is a way for individuals to protect their self-esteem, attributing good performances to their abilities and effort, and blaming poor performances on factors outside their control.