Which data category best describes information derived from the researcher’s own measurements, such as measurements or notes from an inspection?

• A. Anecdotal data
• B. Primary data
• C. Secondary data
• D. Tertiary data

Answer: (B)

The key idea is how data are obtained. Information that comes from the researcher’s own measurements and inspection notes is primary data because it is collected firsthand for the current study, not pulled from someone else’s work. In an appraisal context, your field measurements, observations of condition, sketches, and notes from your inspection are all primary data.

Anecdotal data are informal, single observations or stories that aren’t systematically collected. Secondary data come from sources other than the researcher—existing reports, databases, or studies originally gathered for another purpose. Tertiary data are summaries or compilations of primary and secondary data, like handbooks or encyclopedic summaries. Since the question describes data produced directly by the researcher’s measurements and notes, it best fits primary data.