Dr. Jones is studying the effects of fatigue on aggression. He hypothesizes that the more fatigue a person is experiencing, the more aggressively the person will behave. Dr. Jones's control group should be composed of ____participants.?

A brain-imaging method using radio waves and

magnetic fields of the body to produce detailed images of the brain is called ______________. a) magnetic resonance imaging (MRI) b) electroencephalography (EEG) c) positron-emission tomography (PET) d) computerized axial tomography (CT)

By age 6 to 7, children in diverse Western cultures have formed at least __________ broad self-evaluations

A) two B) four C) six D) eight