As an emotion is accompanied by various physiological responses, body language, goal directed behavior, appraisal etc.  Calibration of<unk>  can be done by various ways, e.g. behavioral , electrophysiological, hemodynamic, interview-based measures, and self-reports.
Anhedonia diagnostic criteria
Acute stress disorder diagnostic criteria
Insomnia diagnostic criteria
Bipolar disorder diagnostic criteria
Delusional disorder epidemiology and demographics
Delusional disorder classification
Generalized anxiety disorder classification
Bipolar II disorder diagnostic criteria