Final answer:
JC's belief in his ability to knockout Gunther demonstrates the 'strength' dimension of his task-specific self-efficacy, showing a strong conviction in his capability to accomplish the task.
Step-by-step explanation:
The confidence JC has in his ability to knock out Gunther reflects the strength dimension of task-specific self-efficacy. This dimension refers to the conviction of how sure an individual is about performing a given task successfully. In JC's case, even though he acknowledges the difficulty of the task, his belief in his ability to achieve it suggests a strong level of self-efficacy.
Regarding the broader topic of self-confidence in one's abilities, the correct term for this is self-efficacy, as seen in the provided information. This is a personal judgment of how well one can execute courses of action required to deal with prospective situations.