Reliability
Intraclass correlation (ICC)
Assesses measurement reliability when several raters measure the same objects.
Variables
- RatersContinuous · Ordinal — at least 2
Options
- ModelTwo-way mixed (consistency) · Two-way random (absolute agreement) · One-way random
- Measurement unitSingle rater · Average of raters
What it reports
Assesses measurement reliability when several raters measure the same objects; all six forms are reported.
statsmodels · formula · Open the accuracy report
When does this apply?
Use when the same objects are rated by several raters or by several repeated measurements; each rater is a separate column, one row is one object. The model and the measurement unit are chosen from the study design, not from the data. All six ICC forms are reported with confidence intervals, together with the standard error of measurement (SEM) and the minimal detectable change. No quality verdict is given.