Which of the following mechanisms can sometimes backfire when used to motivate individuals?

The correct choice highlights how external rewards can sometimes lead to unintended consequences in motivation. While external rewards, such as money, prizes, or other incentives, are effective in encouraging desired behaviors in the short term, they may also diminish intrinsic motivation over time. When individuals become focused on the external reward, they may lose interest in the task itself, which can lead to reduced engagement and creativity. This phenomenon is often referred to as the "overjustification effect," where the presence of external rewards undermines intrinsic interest in an activity.

In contrast, praise for effort, clear feedback, and opportunities for growth are generally associated with fostering a positive learning environment and encouraging intrinsic motivation. These mechanisms emphasize personal development and the value of the learning process, helping individuals stay motivated and engaged without relying solely on external incentives.