The Collaborative International Dictionary of English v.0.48:

internalization \internalization\ n.
   1. learning (of values or attitudes etc.) that is
      incorporated within yourself.

   Syn: incorporation.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

internalization
    n 1: learning (of values or attitudes etc.) that is incorporated
         within yourself [syn: internalization, internalisation,
         incorporation]