Final answer:
Self-efficacy is the likely strong feeling that your niece has. It is an individual's belief in their own capability to complete a task.
Step-by-step explanation:
Based on the provided information, the strong feelings that your niece likely has is self-efficacy. Self-efficacy is an individual's belief in their own capability to complete a task. It involves having confidence in one's abilities and a belief in one's capacity to succeed.