Adult education, officially known as “Androgogy”, is well-defined as the set of definite abilities and related knowledge geared towards the educational development of adults. The way learning happens in children and the way learning happens in adults are completely different. Adults are self-focused and are probable to take the responsibility for their own judgments. Malcolm S. Knowles, theorist of adult education has identified six principles putting some assumptions of how adults learn. The Adult Learning Principles Infographic talks about those principles of adult learning.
You may also want to check The Adult Learning Theory – Andragogy – Infographic