The rationale of the Observation Schedule and Record (OScAR) is described, and research is reported to show the extent to which the form fulfills its purposes. In order to provide objective, reliable, and valid information about the teaching process, this classroom observation schedule is used to record the frequency of occurrence of 42 teacher…

The possibility that "coder drift" may be a source of bias in classroom observation systems was investigated in two parallel experiments using the Flanders System of Interaction Analysis. Coder drift may be described as the differences in coding which result when observers create their own idiosyncratic systems of classifying teacher…

The results of two experiments support the hypothesis of "coder drift" which is defined as change that takes place while trained coders are using a system for a number of classroom observation sessions. The coding system used was a modification of the low-inference Flanders System of Interaction Analysis which calls for assigning…

Two predictors of coding performance were validated when 26 trained subjects used the Flanders System of Interaction Analysis to code 11 half-hour videotapes of fifth grade classrooms. The Teacher Evaluation Scale, a high-inference rating system based on the Global Rating Scales, was also used. The predictors were scores on a shortened form of the…

The Principles of Adult Learning Scale (PALS) was developed and validated for measuring congruency between adult education practitioners' actual observable classroom behavior and their expressed belief in the collaborative teaching-learning mode. This model is a learner-centered instruction method in which learner and practitioner share authority…