Social media data structure for analysis

Would there be any sense in collecting data from three years ago? Should we include in the window of time Malala’s address to the United Na...

Would there be any sense in collecting data from three years ago? Should we include in the window of time Malala’s address to the United Nations? There may be a case for doing that: if we want to look at the sentiment (or feelings) toward her over time. For example, has the public perception changed over time? But if we group all of the data about her and don’t take time into consideration, we may find that the dataset is biased toward her as a “hero” (if the amount of conversation were considerably larger when she was nominated for the Nobel Prize) or perceived as a “villain” (if there were a huge outcry at the start of the incident and very little coverage of her as a Nobel Prize candidate).

Attributes of Data That Need to Be Considered

As the example that we have discussed so far illustrates, the “data identification phase” involves a variety of distinct steps. We discussed three of these steps so far. In the projects that we have executed, we have come across a number of attributes of data that come into play in the data identification phase. In this section, we address these attributes and describe how they help during the data identification phase.

Let’s look at the following seven attributes of data:
  • Structure
  • Language
  • Region
  • Type of content (blog, microblog, wiki, and so on)
  • Venue
  • Time
  • Ownership of data (Private, Public, and Proprietary)

Structure 

The simplest way to define structured data is to think of it as data that resides in a fixed field within a record or file. The content of the dataset is very well known—so well known that we can define “columns” of elements in the data such that we will know ahead of time what the data looks like. It’s so predictable that we can have any number of “rows” of this same format and know that it will be consistent across the dataset. This type of data is commonly contained in a relational database or a typical spreadsheet.

Various data manipulation and data analysis tools and techniques can be used for this type of data. One example of this type of data is survey results. If a company surveys its customers and collects their (well-defined) answers to specific survey questions, this data can be organized in a relational database since we know the question and we know all possible values of the answers. Some other examples are inventory records, sales forecasts, maintenance records, and so on.

Unstructured data , on the other hand, cannot be easily stored in a relational database to facilitate data manipulation or data analysis. For example, in the survey example shown in Figure 1.3, if the survey form includes a field for free-form comments, the responses to this field can be considered “unstructured data” because we have no way of knowing ahead of time what will be entered (other than it will consist of a string of characters).

A collection of tweets about a Super Bowl advertisement is another example. Some people will rave about it, but others will hate it. In either case, we have no idea of the structure of the comments or the format in which they will say it. Other forms of unstructured data include images, audio, and video files.

Language

Consider these simple statements:
“I love the taste of the new Coke.”
and
“Pepsi is my favorite soft drink.”
In French, they become:
“J’aime le goût du nouveau Coke.”
and
“Pepsi est mon préféré softdrink.”

If the objective of the project is to identify the number of mentions of Coke versus Pepsi in popular media, perhaps the exact language of the post (whether English or French) isn’t all that important. However, if the objective of the project is to identify how many positive mentions of Coke there are as compared to Pepsi, the language becomes very significant. For example, if the tool for sentiment identification “detects” sentiment using a dictionary lookup of positive/negative terms, one needs to ensure the language used is supported for those dictionaries.

Region

While it may seem obvious, if the goal is to understand the issues associated with clean drinking water in South Africa, it is important to ensure that the data included in the analysis is only from that region of the world. On the other hand, one may be interested in a world view of clean water in an attempt to understand how South Africa is discussed within that context. In the former case, one needs to be able to filter the initial data source by the country or origin. Some sources of social media (such as Twitter, which uses location-aware technology on mobile devices) do that very well, although the amount of data is sometimes smaller than that from non-mobile devices. Of course, a native South African blogging from a site in the United Kingdom may be of interest in the analysis; in this case, the question (or problem) becomes: can one easily identify that blog author as South African?

Type of Content

A number of different data sources can be used in the analysis of consumer sentiment or in the understanding of any discussion around a particular topic. Each of these different data sources has its own unique challenges in terms of manipulation and analysis, and quite honestly, usefulness. For example, a tweet can be only 144 characters long, while a paper in a technical journal can span multiple pages. This is an attribute that really identifies a variety of different types of content. Consider some of the following sources of potential social media data structure content:
  • Text—Written text that is easy to read and understand if you know the language
  • Photos/pictures—Scientific drawings, simple sketches, or photographs
  • Audio—Audio recordings of books, articles, talks, or discussions
  • Videos—Orientation , education, and training; “How to”
With the rise of social media outlets such as YouTube, Pinterest, and Snapchat, virtually every Internet user can become a publisher, broadcaster, and critic. With Facebook claiming about 1.5 billion active users—each with the average user posting 90 pieces of content a month—that averages out to about 7.5 billion pieces of social content to potentially be analyzed per month. But also consider nonprint content, specifically videos. YouTube’s over 1 billion users upload more video content in a 60-day period than the three major US television networks have created in 60 years.

Consider the recording of a conference session on the use of specific tools or services. The off-the-cuff comments or live user feedback could reveal very interesting observations about a topic that, when overthought, may not make it into a white paper or published blog. A simple preprocessing of the data—what we like to call “data augmentation”—would take the audio/ video content and transcribe it into text, where it can be treated like regular unstructured data from Twitter, Facebook, or LinkedIn.

As Kyle Wong pointed out in Forbes, as more social media platforms (like Twitter) begin to emphasize photos and link them to purchasing opportunities (such as Pinterest), brands will need to measure visual content as a form of “word of mouth” marketing.

News, Press Releases, and Instructions

At first, the thought of using news stories for deriving customer sentiment or opinions doesn’t seem very productive. Most news stories present the opinion of an organization (some will argue that the opinions of these organizations are biased) or simply report the news of a new product announcement using a company’s marketing material. There is typically no room for understanding the sentiment of readers. However, evaluating the value of using news stories can be interesting for two reasons.

First, most news sites today post an article or story and allow readers to leave comments. Those comments and feedback are the content we may want to “mine” and analyze. If the story goes viral, the amount of feedback could be significant. The ability to derive meaningful inference and insight from comments is enhanced when the number of comments is large.

Another reason to look at the news is to understand the effect it has on the general population. One way to gauge the effect is via sentiment analysis. An analysis of the article could reveal a negative sentiment toward a product or issue. As we gather data within social media data spaces that reference that news story, we may find that the general population doesn’t have a negative sentiment toward the topic but perceives it just the opposite. Of course, if the topic at hand had a positive sentiment before the news story was released and then a negative sentiment afterward, we can assume (but perhaps not know for certain) that the news article had something to do with the change of heart. This is a valuable piece of knowledge for an organization. The understanding of who (or in this case, what news service) can change the public’s perception of you or your product is an incredibly important factor when looking for an outlet to advertise products/services.

As an example of the influence that social media analysis can have on issues of public opinion, consider the ethical issues around the use of animals in medical testing. Animal testing is a huge “hot button” issue with a large number of opinions on either side of the debate. On its own, it’s an industry in which there are not only companies dedicated to the breeding of animals used for experimental purposes but also concerns around those companies that employ those techniques.

According to a study reported in Science [7] in early 2014, support for medical testing on animals had declined overall by 12% since 2001 (in the United States), and according to the analysis, the researchers believed the Internet (specifically social media) may be responsible for the decline. The study, which was conducted by researchers at the advocacy group People for the Ethical Treatment of Animals (PETA) and Western Governors University, analyzed survey data from the previous 12 years looking at public opinion around this topic. A result of their work showed that 41% of American adults considered animal testing “morally wrong” in 2013, up from 29% in 2001. Opposition (luckily) to such testing has risen among all demographic groups, but the biggest jump has been among people aged 18 to 29, which jumped to 54% in 2013 versus just 31% in 2001. If we look at the social media impact, we see that animal rights organizations have a much stronger presence on social media than do pro-animal testing groups.

PETA, for example, had more than 2 million followers on Facebook and nearly a half million on Twitter, as opposed to the Foundation for Biomedical Research, which has around 130,000 followers on Facebook and about 1,700 on Twitter at the time of the study. As a result, the researchers speculate, these organizations may be getting their message out more effectively, especially among young people.

Discussion Forums, Blogs, Wikis, and Microblogs

From a social media perspective (or the “true” voice of a customer), there is nothing better than social media sites where people express their feelings, anxieties, and joys 24 hours a day, 7 days a week (and usually many times per day).

Social media refers to the interactions among people or groups, where they create, share, and exchange information and ideas in an open and mostly public venue. The term social media also can be viewed in a much broader context of Internet-based tools and platforms that increase and enhance the sharing of information. This new communication vehicle makes the transfer of text (opinions), photos, and audio/video (marketing) increasingly easy among users and (with the growth of mobile devices) instantaneous.

Platforms such as Twitter, Facebook, and LinkedIn have created online communities where users can share as much or as little personal information as they desire with other members. Some are more “open” than others. For example, with Facebook and similarly LinkedIn, anything posted to your wall can be viewed by everyone in your community (your friends), which is a finite number. In the case of Twitter, anything said is instantly available to the over 289 million Twitter users on the planet [8]. The result is an enormous amount of information that can be easily shared, searched, and created on a daily basis.

Venue

Content is getting generated and shared in a variety of venues. There are popular news sites such as Time, CNN, and Huffington Post. There also are professional networking sites such as LinkedIn, social networking sites such as Facebook, and microblogging sites such as Twitter. Depending on the type of project you are working on, the venue becomes very significant. For example, if your project involves understanding sentiment about tennis players during a tennis match, a microblogging site like Twitter is probably a very good source of information. If, on the other hand, you are trying to understand which government contracts are insisting on accessibility features, you might have to target some specific venues to get to this type of information.

Following is a representative list of common venues that we typically encounter:

News

Newspapers and magazines
News sites (CNN, Time, Huffington Post)

Social networking/social sharing sites

LinkedIn
Google+
Facebook
SlideShare

Blogs

WordPress
Tumblr
Microblogging platforms like Twitter

Custom venues

Government procurement websites
Websites dedicated to legal or medical professionals

Time

Author Jarod Kintz once said, “Just because I liked something at one point in time doesn’t mean I’ll always like it, or that I have to go on liking it at all points in time as an unthinking act of loyalty [9].” This brings us to the temporal state of data.

When we think of the time attribute of data, we’re referring to the currency of it. For your analysis, do you need content for the past week, month, or for the past 10 years? Sometimes for a project there is a need to access data in real time or near real time. For our purposes, we like to think of data in these two states:
  • Data at Rest has been created and isn’t changing (or actively being added to). For example, if you are trying to analyze Twitter content to determine which movie was the most popular among users in social media before the Academy Awards of 2011, most of the data would be “at rest,” meaning the content is already created and the analysis can be done at your own pace.
  • Data in Motion is real-time data created continuously and constantly. For example, if one is trying to identify the shifting sentiment between Barack Obama and Mitt Romney during the 2012 presidental debates, the data would be considered “in motion” during the course of the debate.

One variation of Data in Motion is something we call “near real time”; this data is collected in real time but is slightly late in its arrival. For example, we collect Twitter data in our lab in real time, but we copy the collected data to our analysis systems once every 5–10 minutes (due to some processing overhead). So this data is close (or near) to real time, but not instantaneous. Being able to get access to instantaneous data for analysis purposes requires a significant investment in storage and computing capacity. Often, near realtime data can serve the purpose at a significantly lower cost.

Ownership of Data

One way to look at the ownership of data is to think of data as “internal” (belonging to a company) or “external” (data in the public domain). Another way to think about it is to divide this area into these types:
  • Public Data: A majority of the content shared by people on Facebook, Twitter, and other public venues is predominantly public data. People performing analysis of this kind of data still have to be careful. The venues where the content is created and disseminated have specific terms that define what constitutes the proper use of that data. For example, using a public Twitter feed, users can gain access to a variety of actual tweets being used by different people about a particular topic, but specific terms from Twitter govern how these tweets can be included or displayed on our own website. In addition,  users of this data also need to adhere to the specific guidelines provided by each country about the use and handling of public content.
  • Private or Proprietary Data: All of the social media content generated in a company’s intranet should be considered either private or proprietary. There are specific terms of use for this data.

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