The variance of 
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.
Definitions:
Brain Abnormalities
Refers to structural or functional deviations in the brain that differ from the typical pattern, which may impact health and behavior.
Validity
Validity refers to the extent to which a test measures what it is supposed to measure.
Test Validity
The degree to which a test accurately measures what it is intended to measure.
Comorbidity
The co-occurrence of two or more disorders or diseases in the same individual, often complicating diagnosis and treatment.
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