Content Validity: addresses the question: Is the full content of a definition represented in a measure'? A conceptual definition holds ideas: it is a "space" containing ideas and concepts.Measures should sample or represent all ideas or areas in the conceptual space. Content validity involves three steps. First, specify the content in a construct's definition. Next, sample from all areas of the definition. Finally, develop one or more indicators that tap all of the parts of the definition.