Perry's research found stages of progression in students' thought processes over four years (psych notes)

1.  Initially rigid to flexible.
2.  Recognize the existence of a wide variety of ideas.
3.  Come to see knowledge and values as relative.
4.  Feel lost because there is no one meaning to it all;
5.  Come to a commitment within relativism-- come to judge based on information, values, and beliefs, despite uncertainty and recognition of other possibilities.