Final answer:
Autism, bipolar disorder, schizophrenia, and obsessive-compulsive disorder (OCD) show predispositions in family histories based on available research.
Step-by-step explanation:
The available research suggests that autism, bipolar disorder, schizophrenia, and obsessive-compulsive disorder (OCD) all show predispositions in family histories.
For example, studies have found that the risk of autism is higher in families with a history of autism spectrum disorder. Similarly, a family study of obsessive-compulsive disorder (OCD) found that individuals with a first-degree relative with OCD were at increased risk of developing OCD themselves.
Overall, these findings suggest that there is a genetic contribution to these disorders and that individuals with a family history of these disorders may be more susceptible to developing them.