Gale Primary Sources - Term Clusters and Term Frequency Tools

This tutorial demonstrates use of two tools within Gale Primary Sources-- Term Clusters tool, which helps narrow research topics and identify new research paths, and Term Frequency, which analyzes occurrences of terms within primary sources.

The term clusters tool generates

a visual representation of your results

by topic and subtopic

based on an analysis of frequently occurring

and related terms.

There are two ways to visualize your results.

In the wheel view, terms that occur most frequently

appear in the inner ring.

More specific terms appear in the outer ring.

The darker and redder a term appears,

the more popular that term is.

The lighter and greener a term appears,

the less popular that term is.

Use term clusters if you're having trouble coming up

with a research topic,

when you have an idea for a topic

and want to investigate related topics,

or when you want to narrow your search results

because the search returns a large number of results.

Click on an arrow to expand the ring

to view additional terms.

Click on a term to view a list of results.

Select an item from the results list to view the document.

A link will allow you to return to your diagram.

In the tile view, terms that occur most frequently

appear in the largest tiles.

More specific terms appear in the smaller tiles.

Click on a tile to view additional terms.

You can access the term frequency tool

from the resource banner or from your search results.

Use the term frequency tool

to find out how often your search term occurs

in these collections over time.

Term frequency suggests the importance

of a particular concept during given time periods.

To begin, enter a term.

Click add row to add more terms.

You can specify a date range or specific content types.

You can choose to view your results by frequency,

that is the number of documents for the year,

or by popularity,

the percentage of the total documents for the year.

The graph shows the number of documents

containing your search term by year.

Click on a point to view results for that year.

You can print the chart or export the data as a PNG image

or as a CSV file.