Section author: Jonas Rafi


How to perform a mixed ANOVA in jamovi:
  1. You need one continuous continuous variable for each within-subject measurement (e.g. pre / post) and at least one nominal grouping variable (between-subjects-factor) with at least two levels (e.g., treatment / control, gender).
    A correct setup should look similar to this:


  2. Select Analyses β†’ ANOVA β†’ Repeated Measures ANOVA.


  3. In the box Repeated Measures Factors: write the name of your outcome variable (e.g., My_scale) and name the levels for each measurement occasion (e.g., Pre, Post and 12 month follow-up). The images below illustrates this.

    add_var_anova_repeated_naming_1 β†’ add_var_anova_repeated_naming_2

  4. Drag and drop your outcome variables to their respective cells in Repeated Measures Cells.


  5. Move your grouping variable(s) to Between Subject Factors.


  6. The result is shown in the right panel:


Further help from the community resources

A little more comprehensive introduction into this statistical method is provided by this video.