Conceptions of Reading (COR), a research project within the Institute for Research on Teaching, has modified the "Role Construct Repertory Test" (Rep Test) to tap teachers' conceptions of reading. Developed by psychologist George Kelly to aid in discovering personal belief systems, the Rep Test has been modified by other researchers to aid in determining how people organize information. For the COR group's research, teachers with strong points of view about reading were identified through a Proposition Sort in which they sorted statements about reading according to their beliefs. The teachers then performed modified Rep Test tasks requiring them first to list students' names on cards, sort them according to how the students received reading instruction, and explain their reasons for sorting them in that way; and then to compare three students to each other, telling how two were alike and one was different in terms of reading and success. Teachers then discussed their beliefs about instructional materials and reading. Data gathered from the teacher/interviewer dialogues yielded information regarding six conceptions about reading and reading instruction. Classroom observations have provided evidence that teachers' behaviors are fairly consistent with their conceptions as tapped by the Rep Test, indicating that the Rep Test, in combination with the Proposition Sort, is an effective screening method. (GW)