Freud's theory of the unconscious
Freud believed that we are only aware of a small amount of our mind’s activity, and that most of it remains hidden from us in our unconscious. The information in our unconscious affects our behavior, although we are unaware of it.
Source
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"CNX Psychology, Psychology. July 12, 2015."
http://cnx.org/contents/4abf04bf-93a0-45c3-9cbc-2cefd46e68cc@4.100:61/Psychology
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