Lit Review: Stephen Wan

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https://scholar.google.com/citations?user=YMRsSGcAAAAJ&hl=en&oi=sra https://scholar.google.com/scholar?q=%22Stephen+Wan%22+%22suicidal+ideation%22&hl=en&as_sdt=0&as_vis=1&oi=scholart

• (2016) The Role of Features and Context on Suicide Ideation Detection
• (2015) Detecting Suicidality on Twitter *(2018?) Detecting Suicidality on Twitter

.... Man, we have a lot of ideas in common. Might be another lab I should consider applying to.

• (2015) Ranking election issues through the lens of social media

Additional related research:

• **(2017) Detecting and explaining crisis
• (2017) A Cross-modal Review of Indicators for Depression Detection Systems - (alt link)
• The Use of Technology in Suicide Prevention
• (2017) Depression and Self-Harm Risk Assessment in Online Forums
• (2005) Change of suicidal ideation induced by suicide attempt
• (2015) The use of technology in suicide prevention
• (2018) A Computational Approach to Feature Extraction for Identification of Suicidal Ideation in Tweets
• (2018) Helping or Hurting? Predicting Changes in Users' Risk of Self-Harm Through Online Community Interactions

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Curated dataset: 2016 CLPsych ReachOut.com

David N Milne, Glen Pink, Ben Hachey, and Rafael A Calvo. 2016. CLPsych 2016 shared task: Triaging content in online peer-support forums. In Proceedings of the Third Workshop on Computational Lingusitics and Clinical Psychology, pages 118–127.

http://clpsych.org/shared-task-2017/

http://www.aclweb.org/anthology/W/W16/W16-0312.pdf - Includes an interesting (looking, at least) discussion of the ethics associated with projects like this

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approach:

• 2 class - concerning vs not
• 3 class - strongly concerning, possibly concerning, safe to ignore ** Strongly concerning: there's an immediate risk, not conditional, a plan is expressed.

The three class is similar to the idea I had to classify /r/all vs /r/SuicideWatch vs. /r/Depression, except my goal is less to distinguish between possibly/strongly concerning than to distinguish between a depressive sentiment and a suicidal ideation. Might be equivalent.

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CMU tool for lemmatizing twitter shorthand. Might be useful for reddit as well

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context can be extremely useful for labeling, esp. discussion-related features

• Are respondents expressing concern?
• Are there pop culture/media references that may explain use of particular words?
• stylistic features
  • text: capitalization, punctuation
  • sympathy response words
  • personal pronouns
  • time references
  • auxiliary verbs
  • question words
  • POS tagging

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https://people.csiro.au/W/S/Stephen-Wan
stephen.wan@data61.csiro.au