If a diagnosis of a psychological disorder is valid, then we should be able to predict the course of the disorder. This is called

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Predictive validity refers to the ability of a diagnosis or assessment to predict the future course of a disorder, including its symptoms and outcomes. It is an important component of the overall validity of a diagnosis and indicates whether a diagnosis provides accurate and useful information about a person's condition. In contrast, predictive reliability is not a commonly used term in psychology and truth in diagnosis is a concept that is difficult to define and assess.

If a Diagnosis of a Psychological Disorder Is Valid, Then