in·tro·ver·sion 
(ĭn′trə-vûrzhən)
(ĭn′trə-vûrzhən)n.
1. The act or process of introverting or the condition of being introverted.
2. Psychology The direction of or tendency to direct one's thoughts and feelings toward oneself.
in′tro·versive (-vûrsĭv) adj.