Target Anchoring
Every comparable SUD rating belongs to a specific target. Ratings without a target anchor are non-comparable.
Subjective Units of Disturbance (SUD) Scale
Subjective Units of Disturbance Scale is a repeatable EMDR process measure for EMDR practitioners. It helps record the client's current subjective disturbance in relation to a specific trauma target so changes can be compared during reprocessing.
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Tool guide
Learn more about this tool
Use this background section to understand when the tool fits, how practitioners use it, and what to consider before sharing it with clients.
Repeated Use
The tool is designed for repeated entries across sets or sessions while preserving a chronological disturbance history.
Does the SUD tool make clinical recommendations?
No. It records and compares reported ratings; decisions about pacing, continuation, or closure remain practitioner decisions.
Can ratings from different targets be combined?
No. Multiple targets require separate SUD histories.
What happens with an out-of-range rating?
Out-of-range ratings are invalid and should not be saved as valid SUD entries.