Final answer:
The technique that measures the changes in electrical activity of the brain using scalp electrodes is Electroencephalography (EEG). option 1 is answer
Step-by-step explanation:
The technique that involves attaching electrodes to the scalp to measure the changes in electrical activity over time as a person performs a task is known as Electroencephalography (EEG). An array of electrodes is placed around the person's head to capture the electrical activity emanating from the brain.
Functional Magnetic Resonance Imaging (fMRI) is another brain imaging technique that measures changes in blood flow, and consequently, neural activity, by tracking blood flow and oxygen levels, but it provides a more detailed three-dimensional representation of the active brain regions over time as opposed to EEG.
Positron Emission Tomography (PET) scans and Computed Tomography (CT) scans are also used for visualizing brain activity and structure, but they rely on different methodologies. PET scans use a radioactive tracer to map brain activity, whereas CT scans produce cross-sectional images of the brain using X-rays. However, fMRI has largely replaced PET scans for functional brain imaging because it doesn't involve radiation exposure and provides better spatial and temporal resolution. option 1 is answer