Primary research presents original research methods or findings for the first time (a "first report"). Examples:
Other types of primary sources include:
Secondary research does not present new research but provides a compilation or evaluation of previously presented material. Examples:
If a news source reports on a new scientific study that was published in a journal, the journal article would be the primary source of the study's findings, not the news article.
Note that the vast majority of empirical articles (a term used in Education and Social Sciences) are probably primary literature, but not all empirical articles are primary.