TD theory measures the distance between student, teacher and the distance education course.
TD theory requires the student and teacher to participate in both synchronous and asynchronous discussions in the distance education course.
TD theory helps the student and teacher understand how to access and interact with each other through the distance education course.
TD theory describes distance as the student and teacher perceptions that might lead to a communication gap; or a psychological space of potential misunderstandings between people.
Learner - Instructor
Learner - Interface
Learner - Outcomes
Learner - Content
Learner - Learner