Regression Analysis, R Squared, Pseudo R Squared, Adjusted R Squared, Deviance.
ability to make the model fit (or over-fit) the training data. The formula for Adjusted-R² yields negative values when R² falls below p/(N-1) thereby limiting the use of Adjusted-R² to only values of R² that are above p/(N-1). Comparing the goodness-of-fit of two linear models using Adjusted-R² We