Inter-Observer Reliability - GCSE Psychology Definition

Inter-observer reliability is a way to check if different researchers who are watching or measuring the same thing agree with each other.

In GCSE Psychology, this is important because it helps make sure that the results of an experiment or study are accurate and fair. If two or more observers watch the same behaviour and record similar results, the study is more trustworthy. It means that the findings do not depend on just one person's opinion or mistake.

To achieve good inter-observer reliability, observers might use a behaviour checklist or set rules for what to look for so everyone follows the same guidelines.