If the issue type is called "Research", then issueType = Research should do it. If it's called "Research?", then you'll need quotes because of the ?. So,8issueType = "Research?" will get it.
+1'ed
Besides of Nic's correct point, mind the following:
You can create a new issue type from the above link, by clicking on the 'Add issue type' button from the top-right corner.
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