Detecting phrases that express sentiment

Analyze a document to find phrases that express an opinion or reaction and assess whether the sentiment expressed is positive, neutral, or negative. For English and Japanese, you can also detect specific sentiment targets. The Content Mining application marks these extractions as annotations.

For example, if a product feedback form contains the following sentence, you want to find it and indicate that it is a positive statement.

I love my XYZ blender...

What's the difference between phrase and document sentiment?

Document sentiment is a built-in Natural Language Processing enrichment that is available for all project types. Document sentiment evaluates the overall sentiment that is expressed in a document to determine whether it is positive, neutral, or negative. Phrase sentiment does the same. However, phrase sentiment can detect and assess multiple opinions in a single document and, in English and Japanese documents, can find specific phrases. For more information about the document sentiment enrichment, see Sentiment.

Complete the following steps to enable phrase sentiment analysis:

1. From the analysis view of your collection, click the Collections breadcrumb link in the page header.

2. In the tile for your collection, click the open and close list of options icon, and then choose Edit collection.

3. Click the Enrichment tab, and then select the Sentiment of phrases annotator.

4. Click Save, and then click OK to verify the change.

   The collection is reindexed. Wait for processing to be completed.

5. Click Close to return to the Collections page, and then click your collection tile.

6. In the What do you want to analyze? field, enter a term to search for in your documents or select one or more facets, and then click Search to filter the documents.

   The search results are displayed in the mining graph. The Facet analysis pane is displayed also. By default, Relevancy analysis is shown.

7. In the drop-down menu from the Facet analysis pane, select Sentiment.

8. In Target facets from the Facet analysis pane, expand the Sentiment Analysis option to see facets that are available for analysis in your documents.

9. Click a facet to explore.

   For example, if you click Positive Expression, you can see the following information:

   • Positive expressions that were identified in your documents
   • Sentiment percentage
   • Side-by-side comparison of positive and negative expressions
   • Number of instances of the expression
   • Expression relevancy

10. Click one or more options in the facet list, or select one or both facet lists, and then click Analyze more.

    View the phrase, expression, or target in the Documents or Trends views.

Text from the body field of the document is analyzed. For more information about which field is used for the body text, see Identifying the text field.