Effect Measure Modification Module Revisions - Fall 2024

[mbcann01]

Overview

A running list of little tasks to prep for Fall 2024.

Lab warm-up

• I've reviewed it. I might want to simplify it, but it isn't a priority at the moment.
• Create some R code to go along with the data examples.
• You have to find a better way to explain the difference between EMM and statistical interaction.

Lab

• Started with a lab that Libby created in Fall 2022. It's good enough for this semester.
  • The lab starts with question 1 instead of task 1. I think we could easily make it start with task 1 if I figure out how to turn the table of data into an R matrix and then walk the students through it.
  • I think the format is basically good. We have them do some calculations and then determine if EMM is present on the multiplicative scale and on the additive scale using two methods: Observed vs expected and homogeneity of effects.
• In the future, we should:
  • Add regression!
  • Show them what EMM looks like when graphed (e.g., Socrative Move lessons learned to GitHub #3).
  • Make it longer. Strive to have at least one example of each possible combination of assessment method (observed vs expected, homogeneity of effects, regression), presence of EMM (Yes/No), type of EMM (additive/multiplicative), direction of EMM (positive, negative, qualitative, quantitative).
  • Add more R programming (e.g., to do the calculations. Possibly using matrices and arrays. Definitely using regression).
  • Add questions that ask them to interpret the effect measures (e.g., IRR and IRD), not just calculate them.
  • Walk through a proof of there always being EMM on at least one scale.

Module quiz

• In Fall 2023, I just used R like a calculator.
• Make the revisions above to the lab, then make the module quiz match.

Left off at

• 2023-10-31
  • Complete EMM Quiz

Tasks

• Review the VanderWeele article on interaction
• Create R code to accompany the lab warm-up. That way, you will have some R code to share with the class even if you don't get around to creating lab code. Start using the calculator method.
• Instead of making HTML tables in the code, should I make flextables?