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Levels of measurement
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The four levels

The four levels

Ladder showing nominal, ordinal, interval and ratio with key features and psychology examples

A level of measurement tells you what information a variable contains. In psychology, that affects what averages, graphs and inferential tests you can justify.

Levels of measurement Lesson

  1. A Level
  2. /Psychology
  3. /Levels of measurement

Step-by-step lessons on Eduqas A Level Psychology Levels of measurement. Each one builds up to exam-style questions. Start with the compulsory core topics before tackling the more evaluation-heavy optional and issues-and-debates content.