Results of supplementary region of interest analyses. A–C: Mean % signal changes of line, silhouette, defined, undefined of faces and abstracts extracted from clusters identified from the linear trend contrast across the stimulus formats (A) and from the contrast of undefined versus defined presentation formats (B: right hemisphere, C: left hemisphere). In this contrast, regions were identified with significant activity differences between the two grey bars only. D–F: Mean differences between faces and abstracts in each format (i.e. FL-AL, FS-AS, FD-AD, FU-AU), for the corresponding data in the top row (A–C). All data represent group means (n = 14), and error bars represent SEM.