Normative Data for an Expanded Set of Stimuli for Testing High-Level Influences on Object Perception: OMEFA-II

Abstract

We present normative data for bipartite displays used to investigate high-level contributions to object perception in general and to figure-ground perception in particular. In these vertically-elongated displays, two equal-area regions of different luminance abut a central, articulated, vertical border. In Intact displays, a portion of a mono-oriented well-known (\"familiar\") object is sketched along one side of the border; henceforth the \"critical side.\" The other side is the \"complementary side.\" We measured inter-subject agreement among 32 participants regarding objects depicted on the critical and complementary sides of the borders of Intact displays and two other types of displays: upright and inverted Part-Rearranged displays. The parts on the critical side of the border are the same in upright Intact and Part-Rearranged displays but spatially rearranged into a new configuration in the latter. Inter-subject agreement is taken to index the extent to which a side activates traces of previously seen objects near the central border. We report normative data for 288 regions near the central borders of 144 displays (48/type) and a thorough description of the image features. This set of stimuli is larger than an older \"Object Memory Effects on Figure Assignment\" (OMEFA) set. This new OMEFA-II set of high-resolution displays is available online (https://osf.io/j9kz2/).