Inner conflict between two, or more different personalities. While top dog vs underdog is mostly used in the Empty Chair Technique it is it's own technique apart from the Empty Chair Technique.
Top dog:
Social norms, how we tell ourselves should behave in society. Proper way to behave. Inner control-freak telling ourselves why we "should" or "need" to be something. Inner perfectionist telling ourselves we need to always be pretty, always need to be smart,
Underdog:
Self-sabotage, the inner rebel voice that tells us we should't achieve things, or we shouldn't have things. Our inner bully, we talk horribly to ourselves because we think we can't or shouldn't have something we deserve. The inner self that tells ourselves we aren't attractive enough,
Social norms, how we tell ourselves should behave in society. Proper way to behave. Inner control-freak telling ourselves why we "should" or "need" to be something. Inner perfectionist telling ourselves we need to always be pretty, always need to be smart,
Underdog:
Self-sabotage, the inner rebel voice that tells us we should't achieve things, or we shouldn't have things. Our inner bully, we talk horribly to ourselves because we think we can't or shouldn't have something we deserve. The inner self that tells ourselves we aren't attractive enough,
References
Topdog vs. underdog - Wikipedia. (n.d.). Retrieved February 06, 2017, from https://en.wikipedia.org/wiki/Topdog_vs._underdog
Connection, C. (n.d.). Gestalt Therapy A Guide to Counselling Therapies (DVD) [Abstract]. 6-6. Retrieved February 6, 2017, from http://www.counsellingconnection.com/wp-content/uploads/2013/03/Gestalt-Therapy.pdf
The Gestalt Center of Gainesville, Inc. (n.d). Topdog/Underdog. Retrieved February 06, 2017, from http://www.afn.org/%7egestalt/tdud.htm
Topdog vs. underdog - Wikipedia. (n.d.). Retrieved February 06, 2017, from https://en.wikipedia.org/wiki/Topdog_vs._underdog
Connection, C. (n.d.). Gestalt Therapy A Guide to Counselling Therapies (DVD) [Abstract]. 6-6. Retrieved February 6, 2017, from http://www.counsellingconnection.com/wp-content/uploads/2013/03/Gestalt-Therapy.pdf
The Gestalt Center of Gainesville, Inc. (n.d). Topdog/Underdog. Retrieved February 06, 2017, from http://www.afn.org/%7egestalt/tdud.htm