Interobserver Agreement
IOA
In Plain Language
How closely two independent observers’ records match.
ABA Definition
The degree to which independent observers report the same measurements of the same events, calculated with a method suited to the data.
Everyday Example
Two people independently count birds during the same observation and compare records.
ABA Example
Observers separately score the same session and compare interval-by-interval agreement.
How It May Be Used
High agreement does not guarantee accuracy if both observers make the same error.