Power Calculations in Longitudinal Mixed Effects - from two measurements to three measurements
Datamethods Discussion Forum [Unofficial]
April 10, 2026
I think it is important to emphasize that in my simulation, I used time as a continuous variable with only a random intercept and no random slope. The calculations were based only on p
I have attached a PASS report showing an increase in power with more than seven measurements. To reiterate, the primary issue I’m highlighting is the transition from two to three measurements.
Discussion in the ATmosphere