One definition of substance abuse says people have a severe disorder if they feel substance use causes them serious problems. A second definition lists 11 symptoms and specifies that people must meet at least six for diagnosis. The second definition is

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The second definition, which lists specific symptoms and criteria, is higher in reliability and validity because it provides clear guidelines for diagnosis and is more consistent among different clinicians. It also has clinical significance because it is based on research and the experiences of people struggling with substance abuse.

One Definition of Substance Abuse Says People Have a Severe