Family studies are often used to help determine whether a psychological disorder has a genetic component. Which of the following patterns is typical for a disorder that is influenced by genetics?
1) The disorder is more common in individuals with a family history of the disorder.
2) The disorder is equally common in individuals with and without a family history of the disorder.
3) The disorder is less common in individuals with a family history of the disorder.
4) The disorder is not influenced by genetics.
