Firstly, thank you for your work in developing JASP, it is a brilliant piece of software that I am sure will go a long way!
However, I am having trouble performing post hoc analysis during an ANOVA. Very much like the example for vitamin vs orange juice supplementation at different dosages, I want to look at changes in muscle mass (dependent variable) between males and females at different ages (fixed factors). However, when I select these for my ANOVA and post hoc, I get a warning underneath the output saying "Singular fit encountered; one or more variables are a linear combination of other predictor variables."
I am not sure if this error is arising due to how I have set up the csv file for import into JASP (see attached), but it would appear that the imported format reciprocates the example, so I am sure why I am getting this error message.
Any help would be greatly appreciated!