Which imaging technique is used to show brain activity during specific psychological states?

• A. Magnetic resonance imaging (MRI)
• B. Electroencephalography (EEG)
• C. Positron emission tomography (PET)
• D. Computed tomography (CT)

Answer: (B)

Electroencephalography (EEG) is particularly effective in showing brain activity during specific psychological states because it measures the electrical activity of neurons in the brain. When individuals engage in different cognitive tasks or experience various emotional states, the electrical signals change in a way that reflects these activities. EEG has a high temporal resolution, allowing researchers to observe changes in brain activity in real-time, making it ideal for studying dynamic psychological processes, such as attention, perception, and emotional responses.

In contrast, magnetic resonance imaging (MRI) primarily provides structural images of the brain rather than direct measures of brain activity. It can show brain anatomy and detect abnormalities but does not capture the dynamic functions of the brain while it is engaged in different tasks or states.

Positron emission tomography (PET) can measure metabolic activity in the brain by using radioactive tracers, offering insights into brain function but with lower temporal resolution compared to EEG. While PET can indicate which areas are more active during certain tasks, it does not offer the immediate feedback on changes in brain activity that EEG provides.

Computed tomography (CT) is typically used for assessing structural abnormalities within the brain but does not measure brain activity or psychological states. It offers a static view of brain structure rather than the dynamic changes associated