Luther is preparing a presentation for his students that addresses the relationship between the reticular activating system in the brain and an individual's level of extroversion or introversion. whose theory should luther most likely reference in this talk?

The theory that luther should reference in this talk is: Eysenck

According to Eysenck, People's personality is focused on two major dimensions: Extroversion and introversion.

Extroversion drives people to seek relationship with other people while introversion drives people to seek better understanding toward one's self.