According to the principles discussed, what is often the end result of extrinsic motivation when an intrinsic interest is present?

When extrinsic motivation is introduced in the presence of an intrinsic interest, it tends to diminish internal satisfaction. This phenomenon is often explained by the overjustification effect, where individuals may perceive that their intrinsic motivation for an activity is undermined when external rewards are introduced. As people start to focus on the extrinsic rewards, their enjoyment and internal satisfaction from the activity can decrease, leading them to rely more on external validation rather than their innate interest in the activity itself. This reduction in internal satisfaction can hinder long-term engagement and enjoyment of the activity, as the pleasure derived from it becomes contingent upon external factors rather than personal interest or fulfillment.