ISP® stands for Immediate Stabilization Procedure.

ISP® is an EMDR-derived stabilization procedure for level 1 psychological first aid.

Emergency response procedure (ERP), a crisis stabilization process taught to EMDR trained therapists, was the predecessor to ISP®. The Emergency Response Procedure (ERP) was developed in Israel during terrorist attacks and wartime to modify the standard EMDR protocol.

The evolution of ERP to ISP® was a response to the need for first responders to provide stabilization procedures that could deescalate acute stress reaction (ASR) and reduce the development of post-traumatic stress disorder.