An example that supports the idea that nature and nurture interact is a mental health model like this:

A person may inherit a genetic predisposition for depression, but they only develop the disorder after experiencing severe life stress (such as trauma, loss, or chronic hardship).

Here,

  • the genetic vulnerability reflects nature (inborn biological factors), and
  • the stressful life events reflect nurture (environmental experiences).

The disorder appears when both are present, showing that traits and behaviors often result from an interaction between genes and environment rather than from one alone. This is often called a diathesis–stress type explanation in psychology.