Neuropsychological tests include the Wisconsin card sorting task (WCST) for frontal lobe function, pet scans for blood flow in the brain, and Beck’s depression inventory (BDI) for severity of depression.
Psychotherapy, which does not include drugs, uses cognitive behavioural therapy (CBT) to talk about overcoming negative/irrational beliefs and the ABC model, adding D for disputing beliefs and E for effect of changing approaches to an event.
Anti-depressants are used in the treatment of depression by increasing serotonin to allow neurons to communicate better and decrease depression levels.
Anti-psychotics are used in the treatment of schizophrenia by blocking dopamine receptors to reduce dopamine levels, to then prevent psychotic episodes.