The term "core affect" was first used in print by Russell and Barrett in 1999 in Journal of Personality and Social Psychology where it is used to refer to the affective feelings that are part of every conscious state (as discussed by Wundt in his 1889 System der Philosophie).
The term "core affect" was initially utilized by Russell and Barrett in 1999 within the Journal of Personality and Social Psychology, referring to emotional feelings inherent in every conscious state (as discussed by Wundt in his 1889 System der Philosophie).