One of the most widely used instruments for assessing concerns has been the Stages of Concern Questionnaire (SoCQ) developed by the Concerns Based Adoption Model Project. In this research, different aspects of the validity of a modified version of the SoCQ produced for use with preservice teachers (PSSoCQ) are examined. In all, 10 different research questions were posed. For each question, methods, results and a discussion are presented. Figures include a data summary; a comparison of PSSoCQ with an open-ended instrument; correlation matricies; graphs of the progression of preservice concerns for the two groups over a year, and over the six stages of concern; and a comparison of the norms of preservice and inservice teachers by stage. (CW)