This document provides all details needed to have access to the research collection eRisk 2018.

Any scientific publication derived from the use of this collection should explicitly refer to the following publications:

David Losada, Fabio Crestani. “A Test Collection for Research on Depression and Language use”. In Experimental IR Meets Multilinguality, Multimodality, and Interaction 7th International Conference of the CLEF Association, CLEF 2016, Évora, Portugal, September 5-8, 2016 . Bibtex: bibtex file

David E. Losada, Fabio Crestani, Javier Parapar. Overview of eRisk: Early Risk Prediction on the Internet. CLEF 2018, Lecture Notes in Computer Science 11018, 2018.. Bibtex: bibtex file

The eRisk 2018 collection is available for research purposes under proper user agreements.

Data

The collection contains textual interactions (posts or comments) from multiple users (depressed and non-depressed users; anorexia and non-anorexia users). For each subject, a (usually long) history of writings (posts or comments from a social networking site) is available. This is stored as a XML file (one per subject) with the following structure:

<INDIVIDUAL>
<ID> ... </ID>
<WRITING>
<TITLE> ...   </TITLE>
<DATE> ... </DATE>
<INFO> ... </INFO>
<TEXT> ...  </TEXT>
</WRITING>
<WRITING>
<TITLE> ... </TITLE>
<DATE> ... </DATE>
<INFO> ... </INFO>
<TEXT> ... </TEXT>
</WRITING>
....
</INDIVIDUAL>

ID: contains the anonymised id of the subject

TITLE: title of the post if available (if it is a comment then TITLE is empty)

INFO: additional info about the writing (source of the post/comment)

TEXT: body of the post or comment

User agreement

This collection can only be used for research purposes. If you are interested in having access to this data, please fill the following user agreement and send it to david.losada@usc.es .