The Network output options are useful for exploring and measuring the associations between two or more concepts (search strings) within the articleset(s) used in your query. AmCAT has two options for doing so: clustermaps and network (association) graphs. Both require two or more search terms in the Keyword Search window to work. Remember to put each term on a new line in the window, like this:
Clustermaps show the overlap between concepts in absolute numbers (e.g. there are 104 articles in which search term X occurs but not search term Y, 3490 articles in which search term Y occurs but not X, and 6753 articles in which both occur). To create one, enter two or more search terms in the Keyword Search window, and select ‘Clustermap’ from the dropdown menu under the ‘Network’ output option.
Then, select ‘diagram’ as output type, and click 'Query'. AmCAT will create a visual clustermap.
Below, you see a clustermap for the search terms ‘nuclear’ and ‘danger’ shown in the previous screenshot. As you can see, the term ‘danger’ occurs in 7084 articles, and the term ‘nuclear’ in 57742 articles. Of these 57742 articles, 7070 also contain the term ‘danger’ (the purple circle), while 50672 contain only ‘nuclear’ but not ‘danger’. The little yellow balls in the red ‘danger’ circle each represent an article. So, there are 14 articles that are about ‘danger’ but not ‘nuclear’. You can click on a yellow ball to see a table with these 14 articles. Clicking a row in the table opens the full text of the corresponding article in a new tab. In this way, you can conveniently explore when, or in which context, certain concepts (search terms) co-occur and when they do not.
If you want to export the data for the clustermap from AmCAT, go back to the output type and select one of the CSV options, or SPSS. This exports the numbers in the clustermap as a table in the chosen file format. You can also display the clustermap as a table instead of a diagram, by selecting the 'Table' output option.
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