The degree to which two observers or coders score a behavior in a similar way is a measure of

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Quizplus · Accepted Answer

Reliability refers to the consistency of measurement, and inter-rater reliability specifically measures the consistency between different observers or coders scoring a behavior. Choice B (measurement validity) refers to whether a measure actually measures what it is intended to measure, while choices C (external validity) and D (internal validity) are not directly related to the consistency of scoring by different observers or coders.

The Degree to Which Two Observers or Coders Score a Behavior