Historical documents, legal opinions, and existing records used for measurement describe which category?

Historical documents, legal opinions, and existing records used for measurement describe which category?

• A. Archives (unobtrusive)
• B. Unobtrusive measures
• C. Concept
• D. Operationalization

Answer: (A)

The key idea here is using data that exist without involving people directly—data from archives. Historical documents, legal opinions, and existing records are classic archival sources. They let you measure variables by examining records that were created for other purposes, so researchers don’t interact with subjects or influence their behavior. That combination fits the category of archives (unobtrusive): archives are data that are inherently unobtrusive because they come from preexisting sources. While unobtrusive measures is a broader term for nonreactive data collection, the prompt points to the specific source type—archives—making it the best match. Concepts and operationalization are about ideas and how you turn them into measurable indicators, not about where the data come from. Archie data are cost-effective and nonreactive but can have issues like missing details or coding bias, which researchers navigate when using them.

The key idea here is using data that exist without involving people directly—data from archives. Historical documents, legal opinions, and existing records are classic archival sources. They let you measure variables by examining records that were created for other purposes, so researchers don’t interact with subjects or influence their behavior. That combination fits the category of archives (unobtrusive): archives are data that are inherently unobtrusive because they come from preexisting sources. While unobtrusive measures is a broader term for nonreactive data collection, the prompt points to the specific source type—archives—making it the best match. Concepts and operationalization are about ideas and how you turn them into measurable indicators, not about where the data come from. Archie data are cost-effective and nonreactive but can have issues like missing details or coding bias, which researchers navigate when using them.