A study was designed to determine whether the presence or absence of a classroom observer and the prior knowledge or lack of knowledge that an observation was to occur would affect the verbal behavior of teachers as measured by the Flanders System of Interaction Analysis. The variables were dichotomized yielding a 2 x 2 x 2 experimental design…

The reliability of coding problems associated with observation studies is discussed. The purpose is two-fold: a) to examine coding reliability by applying the profile method to two coding occasions separated by a lengthy time interval with the object of determining both within-occasion reliability (agreement) and between-occasion reliability…

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…

As part of an ongoing investigation of the relationship between teacher behavior and pupil affective and cognitive outcomes, coders practiced recording their observations of existing classroom videotapes in order to determine the amount of interobserver agreement. The videotapes were coded, using seven existing low- to medium-inference classroom…

The issues discussed in these four papers concern the validity and generalizability of classroom observation instruments. These issues have been studied and are reported here in an attempt to better define the limits to which classroom observation instruments can be used in researching relationships between teacher behavior and student outcome.…

The stability of teaching behavior was examined by observing student/teacher interaction over one academic year. One teacher was studied using a time-series analysis. He had 14 years experience and taught physical education in grades K-6 in a single school. Data were collected over one academic year using the Cheffers Adaptation of Flanders…

Written to assist future researchers in conducting cross-national studies of classroom behaviors, this study indicates a number of factors which may reduce the validity of comparisons made. It is based on an investigation which explored the feasibility of using the Activities Categories Instrument and the Flanders Interaction Analysis Categories…