The hypothesis to be tested postulated that cooperating teachers and university supervisors, as observers, affect the student teacher's verbal behavior differently. Data were collected on fifteen elementary education student teachers by the use of a tape recorder during the second, fourth, and sixth weeks of the school year and under the following conditions: no observer in the classroom; cooperating teacher as observer; and university supervisor as observer. A split-plot factorial for the analysis of variance was used to test the hypotheses. Conclusions indicate that cooperating teachers and university supervisors do not affect the student teacher's verbal behavior differently. It was suggested that this study be replicated with larger samples of student teachers. Other variables which should be examined are the observer's nonverbal behavior and the subject matter being taught. (Authors/JN)