The percentage of questions the judges agreed on was 7/10 = 70%. The results are shown below:įor each question, we can write “1” if the two judges agree and “0” if they don’t agree. This is known as percent agreement, which always ranges between 0 and 1 with 0 indicating no agreement between raters and 1 indicating perfect agreement between raters.įor example, suppose two judges are asked to rate the difficulty of 10 items on a test from a scale of 1 to 3. The simple way to measure inter-rater reliability is to calculate the percentage of items that the judges agree on. There are two common ways to measure inter-rater reliability: If a test has lower inter-rater reliability, this could be an indication that the items on the test are confusing, unclear, or even unnecessary. It is used as a way to assess the reliability of answers produced by different items on a test. In statistics, inter-rater reliability is a way to measure the level of agreement between multiple raters or judges.
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