Ask Power - Recent questions in Feature request

State when N refers to N per group or total N for each analysis

Mon, 03 Jun 2024 08:12:41 +0000

It would be very helpful if the output screen could clearly state if N refers to N per group or total N for all groups combined. I haven't tried many tests, but my impression is that this not always consistent across tests - and even if it was, it would still be helpful.

Many thanks for the WebPower package - it is awesome

calculate sample size

Sat, 23 Apr 2022 00:04:14 +0000

Simple mediation of fixed effects for random intercept models

Tue, 25 Aug 2020 01:55:17 +0000

Is it possible to use the path analysis tool for mediation models with repeated measures? I am looking to power a simple mediation model, but one where the two regressions have random intercepts. In other words, there is an independent variable X, a mediator M that every participant responds to n times, and a dependent variable Y that every participant responds to n times. I know I can simply use OLS if I average over the n responses, but I was hoping to avoid that. Thank you in advance for your help.