# Root mean square error

Revision as of 13:38, 6 June 2011 by Zeno Gantner (talk | contribs)

The **root mean square error** (**RMSE**) is a standard error measure for rating prediction. It penalizes large deviations more than small ones. The square root is taken so that the measure has the same unit as the original ratings.

## See also

- Mean absolute error (MAE)