25We present normative data for bipartite displays used to investigate high-level contributions to 26 object perception in general and to figure-ground perception in particular. In these vertically-27 elongated displays, two equal-area regions of different luminance abut a central, articulated, 28 vertical border. In Intact displays, a portion of a mono-oriented well-known ("familiar") object is 29 sketched along one side of the border; henceforth the "critical side." The other side is the 30 "complementary side." We measured inter-subject agreement among 32 participants regarding 31 objects depicted on the critical and complementary sides of the borders of Intact displays and 32 two other types of displays: upright and inverted Part-Rearranged displays. The parts on the 33 critical side of the border are the same in upright Intact and Part-Rearranged displays but 34 spatially rearranged into a new configuration in the latter. Inter-subject agreement is taken to 35 index the extent to which a side activates traces of previously seen objects near the central 36 border. We report normative data for 288 regions near the central borders of 144 displays 37 (48/type) and a thorough description of the image features. This set of stimuli is larger than an 38 older "Object Memory Effects on Figure Assignment" (OMEFA) set. This new OMEFA-II set of 39 high-resolution displays is available online (https://osf.io/j9kz2/). NORMATIVE DATA FOR OMEFA-II 3 40A fundamental aspect of object perception involves determining whether a border 41 between two regions in the visual field is a bounding contour of an object on one side, whether 42 the border is assigned to one side, or owned by one side but not the other. When the border 43 assignment occurs, the region on the side to which the border is assigned is perceived as a figure 44 (i.e., an object) shaped by the border, whereas the other side is perceived as a locally shapeless 45 ground (i.e., a background; e.g., [1 -4]). Border assignment is influenced by figural priors -46 object properties associated with figures rather than backgrounds, including enclosure, 47 symmetry, surroundedness, size, convexity, top-bottom polarity, lower region, contrast, and 48 familiar configuration (e.g., [4 -10]; for reviews: [1, 3, 11]).49 The aforementioned figural priors are image characteristics. Another figural prior -50 familiar configuration -depends upon past experience rather than image characteristics (e.g., [2, 51 12, 13]; for review: [14, 15]). Effects of familiar configuration on figure assignment were 52 demonstrated using vertically elongated bipartite displays like those in Figure 1, each consisting 53 of two equal-area regions (one black, one white) meeting at a central, articulated, vertical border.
54The displays were designed so that the central border sketched a portion of a common mono-55 oriented object (that has a typical upright orientation) on one, "critical," side and not on the 56 opposite, "complementary," side (see Figure 1A). This nominal difference between the t...