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.


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The term clusters tool generates

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a visual representation of your results

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by topic and subtopic

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based on an analysis of frequently occurring

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and related terms.

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There are two ways to visualize your results.

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In the wheel view, terms that occur most frequently

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appear in the inner ring.

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More specific terms appear in the outer ring.

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The darker and redder a term appears,

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the more popular that term is.

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The lighter and greener a term appears,

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the less popular that term is.

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Use term clusters if you're having trouble coming up

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with a research topic,

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when you have an idea for a topic

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and want to investigate related topics,

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or when you want to narrow your search results

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because the search returns a large number of results.

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Click on an arrow to expand the ring

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to view additional terms.

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Click on a term to view a list of results.

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

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A link will allow you to return to your diagram.

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In the tile view, terms that occur most frequently

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appear in the largest tiles.

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More specific terms appear in the smaller tiles.

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Click on a tile to view additional terms.

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You can access the term frequency tool

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from the resource banner or from your search results.

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Use the term frequency tool

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to find out how often your search term occurs

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in these collections over time.

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Term frequency suggests the importance

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of a particular concept during given time periods.

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To begin, enter a term.

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Click add row to add more terms.

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You can specify a date range or specific content types.

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You can choose to view your results by frequency,

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that is the number of documents for the year,

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or by popularity,

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the percentage of the total documents for the year.

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The graph shows the number of documents

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containing your search term by year.

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Click on a point to view results for that year.

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

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or as a CSV file.