A beginner weightlifter who starts with light weights and gr…

A beginner weightlifter who starts with light weights and gradually progresses to lifting heavier weights notices their strength increasing. They develop a sense of mastery and confidence in their abilities. Which psychological need does this fullfill based on self-determination theory? 

Jamie is trying to build a habit of going to the gym regular…

Jamie is trying to build a habit of going to the gym regularly. To help with motivation, Jamie’s friend, Taylor, decides to help him. Every time Jamie completes a workout session at the gym, Taylor gives Jamie a small reward, such as a healthy smoothie or a motivational message. Additionally, Taylor praises Jamie’s efforts and progress, highlighting specific achievements like lifting heavier weights or running longer distances. This is an example of