Final answer:
Behavioral therapy has been found effective in treating anxiety disorders, drug addictions, and autism.
Step-by-step explanation:
The therapy that has been found effective in treating anxiety disorders, drug addictions, and autism is Behavioral therapy. Behavioral therapy focuses on changing unhealthy behaviors and developing healthier ones through techniques such as operant conditioning and exposure therapy. For example, in treating anxiety disorders, behavioral therapy may involve exposing the individual to their feared situations or objects in a gradual and controlled manner (exposure therapy) to reduce anxiety.
In treating drug addictions, behavioral therapy may include interventions such as contingency management, where rewards are provided for drug-free behaviors. Behavioral therapy has also shown effectiveness in treating autism, particularly through interventions like Applied Behavior Analysis (ABA), which focuses on teaching and reinforcing desired behaviors.