Exploring the hardship of ease: Subjective and objective effort in the ease-of-processing paradigm
Motivation and Emotion (2008) - Comment
doi: 10.1007/s11031-008-9080-6  issn: 0146-7239  issn: 1573-6644 

Bettina Von Helversen, Guido H. E. Gendolla, Piotr Winkielman, Ralph E. Schmidt