The Stages of Concerns Questionnaire (SoCQ) is an established instrument which has been used primarily with inservice teachers involved in innovations. While it focuses on inservice teachers' concerns about an innovation, the instrument is based on theoretical constructs developed by the work of Frances Fuller and others during the 1960s with preservice teachers. The SoCQ has also been used in some studies with preservice teachers. These studies, others using related measures of concerns, and a pilot study have raised questions about the suitability of the SoCQ in its present form for use with this population. However, the demonstrated usefulness of the extant instrument and its generalizable theoretical base suggest that such a questionnaire may offer a means of measuring and assessing reforms and innovations in teacher preparation so widely called for and in process at this time. The purpose of this study was to examine the validity and reliability of a modified version of the SoCQ intended for use with preservice teachers in undergraduate and fifth-year teacher preparation programs. The results and validity and reliability procedures are reported. In addition, recommendations for further refinements and research are made. (CW)