- EXECUTIVE FUNCTION: Behavior Rating Inventory of Executive Function - Preschool Version (BRIEF-P questionnaire; 24 & 36 mo), Kansas Reflection-Impulsivity Scale for Preschoolers (KRISP; 42 mo), Dimensional Change Card Sort (DCCS; 42 mo), three Stroop Tasks (42 mo), the Grass/Snow task (42 months), and the Day/Night Task (42 months).