In order for a diagnosis to be useful it must be

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For a diagnosis to be useful, it must be both valid and reliable. Validity refers to the accuracy of a diagnosis, meaning it accurately identifies the condition or disorder that the individual is experiencing. Reliability refers to the consistency of a diagnosis, meaning it can be replicated and does not vary significantly between different individuals or clinicians. A diagnosis that is only reliable but not valid may consistently identify the wrong condition, and a diagnosis that is only valid but not reliable may be accurate for some individuals but not consistent between different clinicians.

In Order for a Diagnosis to Be Useful It Must