ERIC does not have a simple method to locate empirical research. Using "empirical" as a keyword will find some studies, but miss others. One technique is to search for "Research Reports":
- Use the "Advanced Search"
- Type your keywords into the search boxes
- Under "More Search Options," see "Document Type," and choose "Reports: Research"
- Choose other limits, such as publication date, if needed
- Click on the "Search" button
An alternative is to use terminology recommended by the ERIC thesaurus. Some useful keywords are:
Action Research
Evaluation Research
Interviews
Questionnaires
Case Studies
Experiments
Mail Surveys
Telephone Surveys
Ethnography
Focus Groups
Observation (Participant or Naturalistic)
Qualitative Research
Evaluation Methods
Field Studies
Statistical Analysis
Statistical Studies