In a study of teasing among third-graders, after an intervention on peer interactions, behavioral observers collect the data, rating six behaviors on a 0- to 4-point scale
The observers are not trained by the same person, and there is no measure of interrater reliability. What is likely to happen?
a. The variable of teasing will not be measured accurately.
b. Peer interactions will not be able to be rated.
c. The data will have to be scored independently by the researcher.
d. Comparison with norms is unlikely.
ANS: A
Every variable must be measured in the same way, every time, or the results of the measurement will not be accurate. Measuring physiological variables using observation requires a quality tool for data collection and consistent use of this tool by data collectors. Thus, if the observations in a study are being conducted using multiple data collectors, it is essential that the consistency or interrater reliability of the data collectors be determined.
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