Prototyping with R shiny: Video and Quiz Analysis in MOOCs

1. Prototyping with R
shiny: Video and
Quiz Analysis in
MOOCs
Tim Vogelsang

2. Source: 11 pt, regular
MOOC ?

3. MOOC?

4. Source: 11 pt, regular
iversity.org ?

5. iversity?

6. Source: 11 pt, regular
Problem 1: Videos

7. Problem 1: Video
How engaging
are my learning
videos?
Instructor

8. Problem 1: Video

9. Problem 1: Video

10. Solution: For-Loop
for (i in 1:length(video$user_id)) {!
if(video$event[i]==„play“) {!
for (j in (video$video_second[i]+1):max) {!
vector[j]=vector[j]+1!
}!
}!
else if(video$event[i]==„pause“ | video$event[i]==„stop“)
{!
for (j in (video$video_second[i]+1):max) {!
vector[j]=vector[j]-1!
}!
}!
}

11. Solution: For-Loop

12. Source: 11 pt, regular
Problem 2: Quizzes

13. Problem 1: Quizzes
How suited are
my quizzes?
Instructor

14. Solution: Item Response Theory (IRT)
Quiz 1 Quiz 2 Quiz 3 Quiz 4 Quiz 5 …
Student 1 1 0 0 0 0
Student 2 1 1 0 0 0
Student 3 1 1 1 0 0
Student 4 1 1 1 1 0
Student 5 0 0 0 1 1
…

15. Package „ltm“: Latent Trait Models under IRT
Pr{Xni = 1} =
e n i
1 + e n i
n = ability of person n
i = di culty of item i

16. Source: 11 pt, regular
Problem 3: User Paths

17. Problem 1: Quizzes
How do students
navigate through
my course?
Instructor

18. Source: 11 pt, regular
Prototyping with R Shiny

19. Prototyping with R Shiny

20. Prototyping with R Shiny
ui.R server.R
SelectInput() input$...
uiOutput()
output$... <- renderUI()
SelectInput(): A select list control component.
uiOutput(„name“): Displays interface components created with renderUI().
renderUI(): Makes a reactive version of a function that generates HTML using the
Shiny UI and library (uiOutput)
output$name: Define output elements.
input$name: Use input elements.
reactive({}): A reactive expression updates this value whenever a contained widget changes.

21. Source: 11 pt, regular
Thank You!

22. Thank you!
Tim Vogelsang
t.vogelsang@iversity.org
Matthias Gloël
m.gloel@iversity.org
Miloš Janicki
m.janicki@iversity.org