Initial EMDR processing may be directed to childhood events rather than to adult onset stressors or the identified critical incident if the client had a problematic childhood.  Clients generally gain insight on their situations, the emotional distress resolves and they start to change their behaviors.  The length of treatment depends upon the number of traumas and the age of PTSD onset.  Generally, those with single event adult onset trauma can be successfully treated in under 5 hours.  Multiple trauma victims may require a longer treatment time.