The dominance of spatial information in object identity judgments: A persistent congruency bias even amidst conflicting statistical regularities.

Previous studies have posited that spatial location plays a special role in object recognition. Notably, the "spatial congruency bias (SCB)" is a tendency to report objects as the same identity if they are presented at the same location, compared to different locations. Here we found that even when statistical regularities were manipulated in the opposite direction (objects in the same location were three times more likely to be different identities), subjects still exhibited a robust SCB (more likely to report them as the same identity). We replicated this finding across two preregistered experiments. Only in a third experiment where we explicitly informed subjects of the manipulation did the SCB disappear, though the lack of a significantly reversed bias suggests the ingrained congruency bias was not completely overcome. The inclusion of catch trials where the second object was completely masked further bolsters previous evidence that the congruency bias is perceptual, not simply a guessing strategy. These results reinforce the dominant role of spatial information during object recognition and present the SCB as a strong perceptual phenomenon that is incredibly hard to overcome even in the face of opposing regularities and explicit instruction. (PsycInfo Database Record (c) 2023 APA, all rights reserved).