Public Policy

Database Searching Tips

Searching for journal articles or other resources requires that you first identify a research question. Before beginning your database searches, think of one question you want to try to answer during the searching session.

A good research question

  • does not have a clear, simple answer
  • is free of bias
  • requires original research or data analysis to answer

If you are struggling to come up with a concise and clear research question, consider looking for more foundational or background information on your topic. Consider consulting a textbook, encyclopedia article, or other reference source.

Example Research Questions

Weaker

  • Does Arkansas allow corporal punishment in public schools?
  • What makes active learning the most efficient instructional method?
  • What is the historical background of religious education in public univesities?

Stronger

  • What is the impact of corporal punishment on the academic success of high school students?
  • How does active learning impact information retention in elementary science classes?
  • Does religious identity affect college choice?
  • What factors increase graduation rates of LGBT+ students?

Key Concepts

The major concepts or ideas present in your article. These are the concepts that must be present in an article or other resource in order for it to answer your question. Be sure to explicitly state all of the concepts or ideas that are important for your question, such as intervention, outcome, and population.

The key concepts are bolded in the examples below.

  • What is the impact of corporal punishment on the academic success of high school students?
  • How does active learning impact information retention in elementary science classes
  • Does religious identity affect college choice?
  • What factors increase graduation rates of LGBT+ students? (hidden concept: college)

Keywords

Keywords are single terms or multi-term phrases that are related to your keyconcepts. Keywords can be synonyms (words that mean the same thing), broader terms, more specific terms, or just related terms.

Example

Concept: College

Keywords

  • College
  • Higher Education
  • Post-Secondary
  • Undergraduate

Research databases do not work like Google. Typing a full question or string of words into the search box of a database will almost always return no results. This is because databases require that users utilize operators to define the logical relationship between terms. (Just like calculators require the use of operators [eg, plus sign, multiplication sign] in order to understand what mathematical function you want it to preform.

Boolean Operators

These are words that help the database understand the logical relationship between the terms in your search. The three main operators are and, or, and not.

Boolean Operators

Venn Diagram with only the center area where both circles overlap highlighted.

AND
  • AND limits to results with both of the connected keywords
  • Use AND to narrow you research and return fewer results

Venn Diagram with all areas highlighted.

OR
  • OR limits to results which contain either of the connected terms
  • Use OR to broaden your search and return more results

Venn Diagram with the left portion of the left-most circle highlight.

NOT
  • NOT limits to results which contain the first term but exclude the second, connected term
  • Use NOT to narrow your search and return fewer results

The operator and should be used to connect your key concepts - the ideas that must be present in an article to answer your question. The operator or should be used to connect keywords - the terms that a research might use to talk about a specific concept or idea.

Example Search Statement

Question: What factors increase graduation rates of LGBT+ students?

Key Concepts: graduation; LGBT+ students; college

Search Statement:

(graduation OR retention OR school holding power OR academic persistence)

AND

(LGBT OR gay OR homosexual OR lesbian OR bisexual OR transgender OR genderqueer OR genderfluid OR pansexual OR sexual orientation)

AND

(college OR university OR higher education OR post-secondary OR undergraduate OR graduate students)

 

A screenshot of the ERIC database. Black text in three search boxes and a green search button.

Research databases are sophisticated tools that have many options for refining and perfecting a literature search. Below are just some of the ways you can refine your search statement or your result set.

Phrase Searching

  • Use quotation marks to group two or more words together 
  • Phrase searching ensures that the words inside the quotes will be found in your results exactly as you wrote them
  • Examples:
    "social media"
    "high school"

Limiters

  • Limiters can be used to narrow your search results
  • Full Text will limit your results to items you can read in full, online
  • Peer-Reviewed or Scholarly will limit your results to academic journal articles
  • Date limiters can help you narrow your results by publication date

Truncation and Wildcards

  • Truncation substitutes a symbol, usually an asterisk (*), for any ending of a root word
  • Example:
    econom* = economic, economy, economize, economist, etc.
  • Wildcards are symbols, usually a question mark (?), substituted for one character in a word
  • Example:
    ma?e = mace, made, male, etc.

Subject Headings and Descriptors

  • Subject headings or Descriptors are controlled terms and phrases assigned to articles by reviewers to describe the articles' content
  • Search for specific subject headings to descriptors to limit results to articles that are primarily about specific topics or concepts
  • Each database has unique subject headings and descriptors; they can usually be found in a thesaurus or help page
Annotated screenshot of an ERIC (Ebsco) search identifying examples of search techniques.
  1. Boolean operators
    • AND separates each search box
    • OR separates synonymous or related keywords
  2. Phrase searching
    • quotes ensure that the keyword "action research" is searched as a phrase
  3. Subject headings
    • The keyword "action research" is searched for in the SU Descriptor field to narrow results to articles tagged with the subject heading "action research"
  4. Truncation
    • number* will return keywords like numberal, numberals, numberacy
    • number* will return keywords like number, numbers
  5. Limiters 
    • Search has been limited to full text, peer-reviewed articles, published in or after the year 2000