If observers disagree 15 times out of 75, then the inter-rater reliability is:

Question

Prepp Team · Accepted Answer

Calculating Inter-Rater Reliability

Inter-rater reliability measures the consistency between two or more raters. It indicates the degree of agreement among independent observers.

The formula for inter-rater reliability, expressed as a percentage of agreement, is:

$ \text{Reliability} = \left( \frac{\text{Number of Agreements}}{\text{Total Observations}} \right) \times 100\% $

Given:

First, calculate the number of agreements:

$ \text{Number of Agreements} = \text{Total Observations} - \text{Number of Disagreements} $

$ \text{Number of Agreements} = 75 - 15 = 60 $

Next, substitute the values into the reliability formula:

$ \text{Reliability} = \left( \frac{60}{75} \right) \times 100\% $

Simplify the fraction:

$ \frac{60}{75} = \frac{4 \times 15}{5 \times 15} = \frac{4}{5} $

Calculate the percentage:

$ \text{Reliability} = \frac{4}{5} \times 100\% = 0.8 \times 100\% = 80\% $

The inter-rater reliability is 80%.

Prepp Team · Answer

50%

Prepp Team · Answer

20%

Prepp Team · Answer

60%