Aresearcher is conducting a series of brain scans by using radio waves to briefly disrupt the activity in participants' brains as they complete decision-making tasks. the researcher is using to examine the brain's activity.

(fMRI) Functional Magnetic Resonance Imaging

Explanation:

When a researcher is conducting a series of brain scans by using radio waves to briefly disrupt the activity in participants' brains as they complete decision-making tasks. The researcher is using Functional Magnetic Resonance Imaging to examine the brain's activity. fMRI is the most recent advanced technique as compared to the normal MRI where only series of scans are performed  to know all the anatomy but in fMRI, thinking patterns of a person can also be tracked down with the help of latest scans. It not only measures the thinking pattern but also the compete decision making phenomenon so doctors can better treat the human brain's related complications.

answer; primary source information;

answer; repetitive thoughts; ritualistic behaviors;