Ian's parents have noted that he studies longer and gets better grades when they and the teacher praise his efforts and accomplishments than when they simply acknowledge his good performance. This pattern suggests that Ian is motivated primarily by

Question

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Ian's increased study time and improved grades in response to praise from his parents and teacher indicate that he is motivated by external rewards or feedback, which is the definition of extrinsic motivation.

Ian's Parents Have Noted That He Studies Longer and Gets