Definition extracted from their first level training manual with permission from EMDR Institute, Inc.
Desensitization is the name of the fourth phase (third, fifth) of EMDR treatment. It also refers to one of the effects of treatment in which formerly disturbing memories and cues reach an adaptive resolution and are no longer experienced as disturbing. This treatment effect is evaluated as measured by the SUDS. Phase four generally continues until the SUDS rating of the negative affect reaches O or 1.