Previous research has supported a three-factor division of the Behavior Rating Inventory of Executive Function (BRIEF) when dividing the parent form in 9 instead of 8 subscales. The present study investigated different factor models in the 8- and 9-scale division in both the parent and teacher form of the Norwegian BRIEF version. Confirmatory Factor Analyzes showed best fit for the three-factor model in a mixed healthy and clinical sample, indicating a distinction between Emotional and Behavioral Regulation. This division is in accordance with present knowledge of brain function and may increase the specificity of executive dysfunction in clinical groups.