A therapy that concentrates on changing both thoughts and behaviors is

Cognitive Behavioral Therapy

Explanation: It is an objective, short-term psychotherapy treatment with a practical approach to focus on problem-solving. The purpose behind the therapy is to alter the thoughts and behavior of the person to resolve the conflicts he/she is suffering from, commonly known as CBT. This therapy was originally drafted to treat cognitive distortions but now has been expanded to be used for several mental illnesses including anxiety, schizophrenia, etc. This therapy is more inclined towards the resolution to these disorders by altering the patient's thoughts and behavior.

Cognitive-behavorial therapy (CBT) Apex