Learning by oneself without the aid of an instructor. (Note: See also ‘Persistence’, of which self-directed learning may be one aspect).
An alternative to the term self-confidence. Unlike self-confidence, which is a global feeling of being able to accomplish most tasks, self-efficacy is focused on a specific task and represents the feeling of being able to accomplish that task, which in this context is success in adult learning.
Terms for self-directed learning