Answer:
particular
Explanation:
According to my research on studies conducted by various psychologists, I can say that based on the information provided within the question his is perceiving himself in this way because of the feedback from a particular other. Which in this case is his rugby coach. This can be said because according to psychologists, the feedback given from a particular person to whom an individual has a strong connection to can cause an even bigger effect than from a total stranger or society.
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