Answer:
learned helplessness
Explanation:
According to my research on studies conducted by various sociologists, I can say that based on the information provided within the question the most likely explanation for Kasey's behavior is that she learned helplessness. In this situation it seems that Kasey probably tried on many occasions to impress her boss when she first started working at the company but had no success, therefore she now feels that any attempt to impress him would also be unsuccessful. Therefore she does not try anymore.
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