This change shows the individuals mental change as they gradually move through these six stages to becoming an accomplished thinker. These six stages from Linder Elder and Richard Paul are an essential part of being successful within studies and the criminological field. These stages are as follows; Unreflective; Challenged; Beginning; Practicing; Advanced; Accomplished. These six stages begin to outline the changes that you have to mentally make to become and accomplished person and awaken your intellectual abilities to study