What is a "psychological evaluation" for kids?
First, they must assess whether intervention is necessary in a episode of acute crisis.

http://psychiatryonline.org/pb/assets/raw/sitewide/practice_guidelines/guidelines/suicide.pdf

Subsequently, the evaluation that must be carried out by an expert aims to determine the psychological impact in the present, if it is advisable to follow up and that possible implications would take place in the future.

http://www.apa.org/helpcenter/assessment.aspx