Figure 1: Re-analysis of FFA selectivity.
From: Erratum: High-resolution imaging reveals highly selective nonface clusters in the fusiform face area
Re-analyses were performed on 1-mm3 voxels in the FFA that were activated significantly more to objects than to the scrambled baseline (defined by a voxel-by-voxel general linear model (GLM), intact > scrambled, P < 0.001, no spatial smoothing). Re-analysis of average category responses with cross validation. (a) Voxels were sorted by the category that elicited the maximal response in odd numbered scans, and the average response amplitudes are plotted for even numbered scans. The rightmost column reflects the average response across all activated 1-mm3 FFA voxels. Percentage signal is measured relative to scrambled baseline. Error bars indicate s.e.m. across five subjects from published sessions. All amplitudes were significantly different from the scrambled baseline (t-test across subjects, P < 0.05), except for the bar marked by the asterisk. Stimuli: F, faces; A, animals; C, cars; S, sculptures. (b) Re-analysis of individual voxel selectivity using the signal detection theory measure d′, with cross validation.
where μ and σ indicate the mean and standard deviation of responses. The preferred category for each voxel was determined as the category that yielded maximal response during odd numbered scans. d′ was calculated relative to this category using data from even numbered scans.
