General programs/libraries for studying user search behavior?
I know of few though they do not model user behavior, they just try to present best search results and compare to user ideal. lemurproject.org has books based on it though it is old and in java. For example the user activity recorder works with firefox pre big numbers versioning. That is something like 10 years ago. Maybe has a modeler but almost certainly out of date. Apache Lucene is simpler though made for bigger data sets and regularly updated. Terrier IR platform is similar.