What are Primary Data and Secondary Data in PhD? In PhD, data collection is a matter of great scrutiny. You need to have a clear perception of the primary and secondary data sources.The definition for primary data has been structured as a kind of data that get collected from real-life situations. The researcher undertakes, surveys, interviews, observations to collect the primary data from the sources of origin. Secondary data get defined as data collected from sources that are already collected by other reliable sources. These sources can be either empirical, meaning primary data from former researchers, government declarations, official records.
