Administration of the AEPS-3 Test takes between 30 and 120 minutes. The actual time to administer AEPS-3 varies depending on familiarity with AEPS-3, the child being assessed, how many team members are participating, and knowledge of typical development.

It is generally recommended that the AEPS-3 Test be administered over a two-week period to permit observations of the child in a variety of activities. AEPS-3 contains two sets of assessment activities that cover all the AEPS-3 Test items and enable assessment of up to five children at a time as they participate in routine and planned activities throughout the day.