Marty is a 15-year-old boy whose parents have brought him to a mental health clinic for evaluation. They are concerned because his grades have fallen and he has become angry and sometimes even violent. He spends long periods of time alone and does not want to see his friends. The parents report that he has never been a bad boy nor had problems in school. They are worried about the changes in his behavior. Which of the following is the most likely cause?

Marty is a 15-year-old boy whose parents have brought him to a mental health clinic for evaluation. They are concerned because his grades have fallen and he has become angry and sometimes even violent. He spends long periods of time alone and does not want to see his friends. The parents report that he has never been a bad boy nor had problems in school. They are worried about the changes in his behavior. Which of the following is the most likely cause?

A supervisor observes inconsistency in the psychiatric-mental health nurse's behavior toward a patient; the nurse is unreasonably concerned, overly kind, or irrationally hostile. The most appropriate explanation is that the nurse is displaying:

According to family systems theory, removing the 'identified patient' from the environment most likely causes the:

A 10-year-old boy presents with a history of central abdominal pain of a few hours' duration. On examination he has minimal tenderness in the right iliac fossa and no abnormal findings on rectal examination. Which of the following alternatives should be carried out?

A 75-year-old patient comes to the clinic reporting frequent headaches. As the nurse begins the interaction, which action is most important?