In the diathesis–stress model, the diathesis refers to and the stress refers to an internal predisposition; external trigger external behavior; underlying genetic cause external trigger; internal predisposition underlying genetic cause; external behavior

Diathesis-stress model is a theory in psychology which explains disorder as a combination of genetic predispositions and stressful life experiences.  Diathesis can include genetic or biological factors, and stress is events interrupting or damaging psychological status of a person.  

answer; description;