“…One reason for floor and ceiling effects potentially is the use of age-inappropriate stimuli. Given that the own-age bias exists in face perception, in which participants show a larger FIE for own-age than other-age faces (Anastasi & Rhodes, 2005;Harrison & Hole, 2009;Hills & Lewis, 2011;Kuefner, Macchi Cassia, Picozzi, & Bricolo, 2008), 5 in order to avoid floor effects, faces should be age-matched to the participants. In adults, the processing of other-group faces has been theoretically linked to not using the most expert configural processing system (Hugenberg & Corneille, 2009;Michel, Rossion, Han, Chung, & Caldara, 2006), which lowers performance in such tasks.…”