Sample Size Calculations for Mixed Models

Event details Date: Thursday, October 15, 2026 Time: 12:00 PM to 2:00 PM Location: Online Type: Lecture / Workshop Department: Cornell Statistical Consulting Unit Contact: cscu@cornell.edu About this event Determining appropriate sample sizes for experiments can be a challenge, especially when the anticipated statistical analysis includes mixed-effects (also known as heirarchical) models. In this hands-on workshop, we will discuss the goals of sample size and power calculations in mixed-effects models, and how to use simulations to perform them. This method allows for understanding the effect of sample sizes at each level of a mixed model, and how they affect power. Examples of simulation for mixed models will be done in R using both the simr R package and using the jamovi statistical software. While not required, having experience with sample size and power calculations, such as those in our Introduction to Sample Size Calculations and our Simulation Based Sample Size Calculations workshops may be beneficial, as well as some experience with mixed-effects models. Register Now Official event details: https://events.cornell.edu/event/sample-size-calculations-for-mixed-models