In which scales can you make meaningful interpretation of an arithmetic operation such as addition?

During an interrogation, an FBI agent tries to scare a suspect into making a confession by saying

"You know, they have this new type of lie detector that can measure activity in different regions of the brain to determine whether a person is lying or telling the truth." What technology is the agent referring to? a. fMRI b. Computer Voice Stress Analyzer c. polygraph d. two-photon imaging

Barry is the primary caretaker for his wife, Ellen, who suffers from end-stage Alzheimer's disease. Lately, Barry has found that he is quick to cry, quicker to anger, unable to focus, and often unable to sleep through the night. Which statement accurately describes how a clinician might assess Barry's symptoms?

A. Barry's symptoms reflect typical decline due to aging. B. Many spouses are caretakers and experience little to no distress; Barry is just overly sensitive. C. Barry's caretaking role is demanding and may be the source of his psychological distress. D. Barry is most likely experiencing signs of an underlying severe mental disorder.