Self-efficacy: toward a unifying theory of behavioral change
Bandura A
Psychol Rev. 1977 Mar;84(2):191-215
From the abstract
Expectations of personal efficacy determine whether coping behavior will be initiated, how much effort will be expended, and how long it will be sustained in the face of obstacles and aversive experiences.
Why it matters here
The belief that you can handle what's next decides whether you make the call, send the invoice, and hold the price. Raise that belief at the subconscious root and the money follows the nerve.

