Final answer:
A psychiatrist would look for the symptom of starting fights with other children in a child to make the diagnosis of conduct disorder rather than depression, ADHD, or bipolar disorder.
Step-by-step explanation:
A psychiatrist would look for the symptom of starting fights with other children in a child to make the diagnosis of conduct disorder rather than depression, attention deficit hyperactivity disorder (ADHD), or bipolar disorder. Conduct disorder is characterized by a recurring pattern of behavior that violates the rights of others, and this includes intentionally starting physical fights or being aggressive towards others. While symptoms like irritability, difficulty organizing tasks, excessive activity, and sleep disturbance may also be present in other disorders, starting fights specifically points towards conduct disorder.