Comparing level 1 and level 2 visuo-spatial perspective-taking in the brain: evidence from fMRI.

Level 1 visuo-spatial perspective-taking (VSPT) refers to judging what other people can and cannot see. Previous research has suggested that this form of VSPT can be achieved relatively effortlessly. Level 2 VSPT, which refers to judgments about how an object appears from different viewpoints, is conceptually more complex and linked to higher-level social cognition and mentalizing. Despite growing neuroscientific evidence on VSPT, fMRI studies have not yet directly compared levels of perspective-taking. Study 1 collected fMRI data from a within-subject comparison of level 2 versus level 1 VSPT. We used a common activation contrast comparing inconsistent versus consistent perspectives between self and others. In Study 2, we further distinguished the brain regions associated with level 2 VSPT from those responsive to stimulus ambiguity and complexity. To achieve this, we asked participants to adopt different viewpoints on ambiguous and unambiguous stimuli. Results from both studies found that brain activation for level 2 VSPT was particularly high in areas of the dorsal attention network. Follow-up connectivity analysis found that level 2 VSPT is primarily carried out by the dorsal attention and the frontoparietal network. These results align with theories suggesting that VSPT can be achieved by engaging visuospatial attention and inhibitory control processes.