StarLogo Nova Epidemic Model Challenge

Posted May 25, 2017 by sgibbs

This is the Epidemic Model Challenge from the Project GUTS MOOC.

The Challenge

Use the Experimental Design form to sketch out your intention

  • Consider  “What are the dependent and independent variables?” and “What are the variables that already exist in this model?” [#initially sick, density of population, transmission rate, population movement, recovery rate]  What is the range of values for the variable you chose?  How many trials will you run at each setting?  How will you capture the data?
  • Choose one variable to experiment with, then use the “Experimental Design handout” to describe your experiments and record data from your experiments. 
  • Consider how many trials do you need to run at each setting of the variable.
  • Collect and record data on the Experimental Design Form 

Upload your completed Experimental Design Form and a link to your model to complete this challenge.


Submitted by dbatmn on Thu, 06/22/2017 - 17:25 · Permalink

Still working on getting rid of the bugs, but this challenge assumes that the population will grow at 1.11% for a year. What effect will a growing population have on an epidemic? Once it is working properly we could vary the growth rates to look for trends. 

Bill and Stefanie


Submitted by eso on Thu, 06/29/2017 - 12:36 · Permalink

I'm having the same problem as kcwgtt: I have checked the code from other peoples' working models, but the lines on my graph aren't showing up...


Submitted by sgibbs on Mon, 07/10/2017 - 09:06 · Permalink

I think I see the problem with your graph -- the code on the world page is correct to clear and update your graphs and data boxes (to make it perfect, in the setup code reset your clock to 0 first, then update the data box to show the clock).  The problem is that you also ask the turtles to count themselves on the turtle page, which makes your graph jump up and down.  Delete those two procedures, and your graph will work fine.  


Submitted by sgibbs on Mon, 07/10/2017 - 09:09 · Permalink

Hi Kenneth -- I just opened your project and the graph seemed to work fine.  Congratulations on fixing the problem (whatever it was)!


Submitted by sgibbs on Mon, 07/10/2017 - 09:13 · Permalink

Hi Leona -- I just opened your model and get the dreaded "empty socket in block 0" error code.  I think the problem is in the collision block on the turtle page -- when I click on that block and move it around, one of the blocks inside doesn't move with it, which means it isn't attached (clicked in) completely.  I hope this helps.