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Last blog post I discussed the second project in my applied research class, a sentiment analysis of Tweets using Yoshikoder – a free computer-assisted content analysis program from Harvard.
As promised, I want to share my assignment, and my handout for students that teaches them how to use Yoshikoder. Before we do the project, however, I do a brief in class activity to get students learning how to use Yoshikoder. So let’s start there for today’s post. And next post, I’ll share the assignment itself.
PART 1: THE SET UP
What I like to do, is present the problem to the students via the project assignment. Then, we go back and start learning what we’d need to do to solve the problem. So, after lecturing about what sentiment analysis is and why it is important, I get students introduced first to the idea of constructing a coding sheet for keywords by taking a list of keywords and adding them to categories.
First, we talk about the idea in class, and I show them some simple examples, like: If I wanted to code a sample for the presence of “sunshine” – what words would I need? Students brainstorm things like start, sun, sunny, sunshine, etc., etc.
We discuss the importance of mutual exclusivity, being exhaustive, etc.
I show an example from my dissertation which looked at agenda setting topics on Twitter.
On the class day before I introduce Yoshikoder to the class, students do a practice assignment where I give them a list of random terms related to politics and elections. They then have to create “positive” and “negative” content categories using the terms. The terms aren’t necessarily well fit for this exercise, which gets them thinking a bit… They then hand code a sample of Tweets I provide about two different politicians. I tend to use the most recent election. So, in this case Obama and Romney. They are frustrated by having to hand code these Tweets – but a little trick is to do a search for the exact phrases in the Tweet files on the computer and they are done fairly quickly. Ok, so on the next class period:
1) Practice with Yoshikoder We do the same basic task, but this time they learn to program their “positive” and “negative” categories into Yoshikoder. They then load the Tweets (which I have saved as a txt file) and analyze them for the presence of their positive and negative content categories. This is a great point to stop and have students assess the reliability between what they hand coded and what the computer coded. Often, there will be discrepancies. And this makes for a great opportunity for discussion.
Here is the activity that I use in class. I also provide Tweets that I’ve downloaded using the search terms for the politician/candidate I’m using in the activity (e.g., Obama; Romney) in plain text format so Yoshikoder can read it. Also, see the below handout which I provide students to show them how to use Yoshikoder and how to program, and run the analyses I just described.
As I mentioned above, I create a handout that I like to give students that explains the different functionalities of Yoshikoder and how to run the analyses. As I’ve discussed elsewhere, I like to provide handouts. And the one below isn’t one of my more elaborate handouts. But it provides a quick overview with some screen shots to show what buttons need to be clicked. This is super helpful if you are trying to learn Yoshikoder, or want to use it alongside the activity (discussed in this post or the project discussed in my last post, and which I will provide in my next blog post).
EDIT: The assignment is now up. See the post.
If you’d like to learn more about using Yoshikoder, I found this great tutorial:
– Cheers! Matt