The correlation between high-inference measures and low-inference observation measures was studied using two groups of social studies student teachers (25 students per group). The high-inference measure for two video-taped lessons was obtained with the 10-item Teacher Performance Appraisal Scale (TPAS), on which pupils rated the lesson on a scale from one to seven. The low-inference observation measures were obtained by having trained observers categorize the videotapes into the 10 categories of Classroom Interaction Analysis (IA) observation system of Ned A. Flanders. Separate analyses were made for each group. No steady correlations were established between the high-inference and low-inference data. Another study was then conducted in which scores for the individual items comprising the TPAS were developed, and the results were subjected to additional correlation studies with the IA scores. The only consistent correlation was a negative correlation across observations for the high-inference variable "content organized" and the low-inference variable "student talk--initiation." (DB)