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#Microposts16 - Comparing Social Media and Traditional Surveys around the Boston Marathon Bombing
- 1. Cody Buntain @codybuntain cbuntain@cs.umd.edu HCIL University of Maryland Erin McGrath, Gary LaFree {ecmcgrath,lafree}@umd.edu START Center, UMD Jennifer Golbeck golbeck@cs.umd.edu University of Maryland Comparing Social Media and Traditional Surveys Around the Boston Marathon Bombing 1 #Microposts2016 11 April 2016 Montreal, Quebec CA
- 2. Surveys are mature, ubiquitous, and powerful instruments 2 - Introduction
- 3. Social media platforms produce huge data sets and let users respond to events instantly 3 - Introduction 0 0.4 0.8 1.2 1.6 Facebook*C hina U SA Tw itter* Population(Billions) Instagram Twitter Facebook 1 100 10,000 1,000,000 100,000,000 New posts Since I’ve been talking
- 6. What is the point of this talk? 6 - Introduction
- 7. - Introduction7 The Point To compare social media and survey data Compared across: • Costs • Data Types • Relevance • Validity
- 8. - Introduction8 Grounding the Point
- 9. 9 - Case Study What makes the Boston Marathon Bombing a good case study?
- 10. The Bombing from Multiple Perspectives • Three-wave survey on public perceptions of law enforcement • The bombing happened to occur between waves • Post hoc survey on information seeking/sharing during crises • Included respondents exposed to Boston Marathon coverage • Analysis of public response to the bombing on Twitter • 134 million tweets from April 2013 10 - Case Study
- 11. Why Twitter? 11 - Case Study
- 12. 12 - Results What are the strengths and weaknesses of surveys and social media?
- 13. Four Axes of Comparison • Data types • Relevance • Cost • Validity 13 - Results
- 14. Comparing Data Types 14 - Results Survey Data Social Media Data • Attitudinal data • Behavioral data • Demographic data
- 15. Comparing Data Types 15 - Results Survey Data Social Media Data • Attitudinal data • Behavioral data • Demographic data
- 16. Comparing Data Types 16 - Results Survey Data Social Media Data • Attitudinal data • Behavioral data • Demographic data
- 17. Comparing Data Types 17 - Results
- 18. Comparing Data Types 18 - Results Boston PD Follower Counts Boston-Related Twitter Activity
- 19. Comparing Data Types 19 - Results 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 04-01 04-03 04-05 04-07 04-09 04-11 04-13 04-15 04-17 04-19 04-21 04-23 04-25 04-27 04-29 Percentage of Tweets Containing Emo=on Date Anger Disgust Fear Happiness Sadness Surprise Emotions in Boston-related Tweets from the US
- 20. Comparing Data Types 20 - Results Self-reported “willingness” Sentiment Towards Police in the US
- 21. Takeaway: Social media and survey data provide different types of data - Results Comparing Data Types 21 With some overlap And both are useful for different purposes.
- 22. Four Axes of Comparison • Data types • Relevance • Cost • Validity 22 - Results
- 23. Comparing Relevance 23 - Results • Temporal Relevance • Topical Relevance • Geographic Relevance
- 24. Comparing Relevance 24 - Results Temporal Relevance 2 m onths M arch ‘13 April‘13 M ay ‘13 June ‘13 July ‘13 August‘13
- 25. Comparing Relevance 25 - Results Topical Relevance April1 ‘13 April8 ‘13 April15 ‘13 April22 ‘13 April29 ‘13 M ay 6 ‘13 “police”in Tw itter #delhirape Protests
- 26. Comparing Relevance 26 - Results Geographic Relevance Distribution of Twitter Users Target Country for Survey
- 27. Comparing Relevance 27 - Results Geographic Relevance Distribution of Twitter Users Target Country for Survey ???
- 28. Takeaway: Social media data is more timely than survey data, but surveys can better target topical and geographic responses for higher quality. - Results Comparing Relevance 28
- 29. Four Axes of Comparison • Data types • Relevance • Cost • Validity 29 - Results
- 31. - Results Comparing Cost 31 $300/month $11/month + $3,000/month $3,311/month Average one-time fee: $70,000
- 33. Takeaway: Storing large sets of social media data, contracting with a data reseller, and processing it at scale is significantly cheaper than running nationally representative surveys. - Results Comparing Cost 33
- 34. Four Axes of Comparison • Data types • Relevance • Cost • Validity 34 - Results
- 37. Takeaway: The typical definition of validity is difficult (and perhaps undesirable) to apply to social media data. - Results Comparing Validity 37
- 38. What is the point of this talk? 38 - Conclusions
- 39. Complements and Synergies • Use both social media and surveys where possible • Social media may provide first approximation when time and cost are factors • Survey data can be of higher quality, more targeted, and can ask deeper questions 39 - Conclusions
- 40. Cody Buntain @codybuntain cbuntain@cs.umd.edu HCIL University of Maryland Comparing Social Media and Traditional Surveys Around the Boston Marathon Bombing 40 #Microposts2016 11 April 2016 Montreal, Quebec CA Thank you! Questions?