An exemplary hearing system that is configured to assist a user in hearing includes an in-the-ear (ITE) component configured to fit at least partially within an ear canal of the user while the hearing system is worn by the user, a first sensor electrode provided on a surface of the ITE component and configured to contact, while the hearing system is worn by the user, outer ear tissue of the user, and a second sensor electrode configured to be located, while the hearing system is worn by the user, at an entrance to or outside of the ear canal of the user. The first sensor electrode and the second sensor electrode may be configured to be used to detect a physiological attribute of the user while the hearing system is worn by the user. Corresponding methods and systems are also disclosed.