Outline thesis defense presentation

defense/slides.md

+% You shall not publish: Edit filters on EN Wikipedia
+% Master Thesis Defence
+% Lusy
+
+---
+
+Gandalf
+- on title slide?
+- CI? look up whether there are templates
+
+---
+
+## Overview
+
+* Motivation
+* Research Questions
+* State of the literature/Literature: What does the scientific community know
+* Documentation: What is an edit filter and why was it introduced according to Wikipedia's/MediaWiki pages?
+* Data Analysis: Edit filters on English Wikipedia
+* Evaluation/Limitations
+* Open questions/Directions for future studies
+
+---
+
+- Motivation
+  why? decription of state of the art
+  what is the question? Q1-Q4
+
+- State of scientific research (infographic)
+
+Beiträge der current work
+- Findings for Q1-Q4
+- Directions for future studies
+  - MR is merged: abuse_filter_history table is now available
+
+- Evaluation: what would I do differently?/what went not so well
+  - Start writing after getting hold of all the data
+
+---
+
+## State of the Scientific Literature
+
+<img src="images/funnel-no-filters-new.png" alt="Funnel diagramm of all vandal fighting mechanisms (no filters)">
+
+* One thing is ostentatiously missing: edit filters
+
+---
+
+---
+
+# Open Questions
+
+--- 
+
+## Current Limitations
+
+* Only EN Wikipedia
+* manual filter classification only conducted by me
+
+---
+
+## Bigger picture: Upload filters
+
+<img src="images/Blackout_of_wikipediade_by_Wikimedia_Deutschland_-_March_2019.png" height="500" alt="blackout German Wikipedia March 2019">
+<small>[https://upload.wikimedia.org/wikipedia/commons/c/c5/Blackout_of_wikipedia.de_by_Wikimedia_Deutschland_-_March_2019.png](https://upload.wikimedia.org/wikipedia/commons/c/c5/Blackout_of_wikipedia.de_by_Wikimedia_Deutschland_-_March_2019.png)</small>
+
+---
+
+# Thank you!
+
+These slides are licensed under the [CC BY-SA 4.0 License](https://creativecommons.org/licenses/by-sa/4.0/).
+
+![by](images/Cc-by_new_white.svg)
+![sa](images/Cc-sa_white.svg)
+
+---
+
+# Questions? Comments? Thoughts?
+
+---
+OLD
+
+<img src="images/editors-rise-decline.png" height="500" alt="Rise and decline in numbers of editors on EN Wikipedia">
+<small>Source: Halfaker et al. "The Rise and Decline of an Open Collaboration System: How Wikipedia’s reaction to popularity is causing its decline"</small>
+
+---
+
+# Motivation
+
+* What is the role of filters among existing (algorithmic) quality-control mechanisms (bots, semi-automated tools, ORES, humans)?  Which type of tasks do filters take over? 
+* How have these tasks evolved over time (are they changes in the type, number, etc.)?
+* What are suitable areas of application for rule-based systems such as filters in contrast to the other ML-based approaches?
+
+---
+
+## What is an edit filter
+
+* MediaWiki extension
+* regex based filtering of edits and other actions (e.g. account creation, page deletion or move, upload)
+* triggers *before* an edit is published
+* different actions can be defined
+
+---
+
+## Motivations for its introduction
+
+* disallow certain types of obvious pervasive (perhaps automated) vandalism directly
+* takes more than a single click to revert
+* human editors can use their time more productively elsewhere
+
+---
+
+## Edit filters in the quality control mechanisms frame
+
+* the question of infrastructure
+* guidelines say: for in-depth checks and problems with a particular article bots are better (don't use up resources)
+* they were introduced before the ml tools came around.
+* they probably work, so no one sees a reason to shut them down
+
+---
+
+* hypothesis: Wikipedia is a diy project driven by volunteers; they work on whatever they like to work
+* hypothesis: it is easier to understand what's going on than it is with a ML tool. people like to use them for simplicity and transparency reasons
+* hypothesis: it is easier to set up a filter than program a bot. Setting up a filter requires "only" understanding of regular expressions. Programming a bot requires knowledge of a programming language and understanding of the API.
+
+---
+
+# Data Analysis: Edit Filters on EN Wikipedia
+
+---
+
+## What do most active filters do?
+
+    135  repeating characters & tag, warn
+    30   "large deletion from article by new editors" & tag, warn
+    61   "new user removing references" & tag
+    18   "test type edits from clicking on edit bar" & deleted in Feb 2012
+    3    "new user blanking articles" & tag, warn
+
+---
+
+## Descriptive statistics
+
+<img src="images/general_stats.png" class="left" alt="General filter statistics">
+
+    all filters: 954
+    public filters: 361
+    Active public filters: 110
+    disabled (but not deleted) public filters: 35
+    deleted public filters: 216
+    hidden filters: 593
+    active hidden filters: 91
+    disabled (but not deleted) hidden filters: 118
+    deleted hidden filters: 384
+
+---
+
+Number of filter hits per month March 2009-March 2019
+
+<img src="images/number-filter-hits.png" alt="Number of filter hits per month">
+
+---
+
+Filters Actions
+
+<img src="images/all-filters-actions.png" alt="Filters Actions of all Filters">
+
+---
+
+Active Public Filters Actions
+
+<img src="images/active-public-filters-actions.png" alt="Filters actions of active public filters">
+
+---
+
+Active Hidden Filters Actions
+
+<img src="images/active-hidden-filters-actions.png" alt="Filters actions of active hidden filters">
+
+---
+
+## Manual classification
+
+*vandalism*, *good faith* and *maintenance*
+
+* difficult to distinguish
+* a lot of subcategories
+
+---
+
+Vandalism
+
+    id  hits     public comment 
+   	46	356945	 "Poop" vandalism
+    365	85470	   Unusual changes to featured or good content
+    16	2005	   Prolific socker I
+
+---
+
+Good Faith
+
+    id  hits    public comment 
+    180	175939	Large unwikified new article
+    98	39401	  Creating very short new article
+
+---
+
+maintenance
+
+    id  hits  public comment 
+    577 1566  VisualEditor bugs: Strange icons
+    345	13832	Extraneous formatting from browser extension
+    942	1573	Log edits to protected pages
+
+