Aaron Eckhart stars in this 2016 horror film as Dr. Seth Ember, a scientist who possesses the rare ability to enter the subconscious minds of possessed individuals to perform a non-traditional form of exorcism. What is the title of this movie?

The 2016 horror film you're describing is titled Incarnate (Review). It features Aaron Eckhart as Dr. Seth Ember, a scientist with a very particular and rare skill: the ability to delve into the subconscious minds of those afflicted by demonic possession. Rather than performing traditional religious exorcisms, Ember's method involves entering the victim's mind to confront the demonic entity directly within their dreamscape, essentially "evicting" the demon by helping the host realize they are trapped in an illusion.

This unique approach sets Incarnate apart from many other possession films. Dr. Ember's personal motivation is deeply rooted in tragedy; he is confined to a wheelchair as a result of a car accident caused by a powerful demon known as "Maggie," which also claimed the lives of his wife and son. This personal vendetta drives his work, particularly when he discovers that the demon possessing a young boy, Cameron, is none other than Maggie herself.

Directed by Brad Peyton and produced in part by Blumhouse Productions, Incarnate attempts to blend psychological thriller elements with supernatural (Review) horror. The film explores the idea that demons don't truly control their hosts, but rather lull them into comforting, illusory dream worlds to keep them unaware while the demon manipulates their physical body. While the film received mixed critical reviews, many acknowledged its fresh take on the often-revisited demonic possession genre, offering a more scientific, "Inception"-like perspective on battling malevolent entities.