In an experiment, tennis players who were told that their performance would be used to assess only the quality of their rackets performed much better than an equally skilled group of tennis players who were told that their tennis-playing talent would be measured.
Some tennis players were told that their performance would be used to assess only the quality of their rackets. Others who were equally skilled as the first group of tennis players were told that their tennis-playing talent would be measured. The first group performed better than the second.
What one believes is being assessed in one’s own performance can influence that performance.
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