Theory of Independent Study and Theory of Transactional Distance: (Moore, 1970's)
Also known as "Independent Study" and analyzes two variables in educational programs: 1) learner autonomy and 2) distance between teacher/learner.
Transactional distance is defined as, "the interplay among the environment, the individuals, and the patterns of behaviors in a situation, Moore 2013."
Distance education is composed of two things: 1) Two communication capability (dialogue), and 2) Responsiveness to student needs (structure).