Researchers used functional magnetic resonance scans (FMRI) to measure brain activity in volunteers being asked to make judgments about their own thoughts, opinions, preferences, as well as about someone else's.
Researchers used functional magnetic resonance scans (FMRI) to measure brain activity in volunteers as well as about someone else's. These volunteers were being asked to make judgments about their own thoughts. Judgments about their own thoughts are opinions. Opinions are preferences.