Repeated measures ANOVA
Hypothesis tests · Method and input reference
Each line is a group. Repeated measures and Friedman require the same subjects in matching positions. Dunnett uses the first line as control. Parametric ANOVA assumes normal independent errors; repeated ANOVA assumes sphericity. Synthetic example: 48 people at baseline and three follow-ups; each row is a visit and each column is the same person.
Open calculator · Compare methods in the decision matrix
When to consider it
- Single within-subjects factor, continuous outcome measured at three or more occasions.
Assumptions and scope
- Complete balanced repeated observations; columns in each condition correspond to the same subjects.
- Assess sphericity and residual assumptions. The current calculator does not apply Greenhouse–Geisser corrections.
One within-subject factor only; uncorrected inference.
Required inputs
- Groups (one group per line) — Numeric observations; preserve the row and column structure described above.
Review missing values and data coding before running. Sample inputs are synthetic teaching examples.
Implementation
Lifescio validates inputs and formats results; listed functions are the principal calculation routines, not an exhaustive transitive dependency list.
- statsmodels 0.14.4: statsmodels.stats.anova.AnovaRM
These are pinned library versions; saved results record the versions actually used at runtime.