Figure 1.
Electrode sites are numbered. Red clusters are regions of interest included in analyses. LFP = left frontal-polar, FPM = frontal-polar medial, RFP = right frontal-polar, LFI = left frontal inferior, LFS = left frontal superior, FM = frontal medial, RFS = right frontal superior, RFI = right frontal inferior, LCI = left central inferior, LCS = left central superior, CM = central medial, RCS = right central superior, RCI = right central inferior, LPI = left parietal inferior, LPS = left parietal superior, PM = parietal medial, RPS = right parietal superior, RPI = right parietal inferior.
Figure 2.
A) Mean amplitudes from the test phase depicting recognition-related brain activation for “recollected” and “familiar” old faces and correctly rejected new faces for in-group and out-group faces. Vertical lines highlight the time segment from 600 to 900 ms used for statistical analysis of the parietal old/new effect. See Figure 1 for abbreviations of regions of interest and their locations. B) Voltage maps of ERP difference waves between “recollected” and “familiar” conditions showing the parietal old/new effect at 600-900 ms for in-group and out-group faces. Spherical spline interpolation was used.
Figure 3.
Mean amplitudes from the first run of the study phase depicting encoding-related brain activation (Dms) for subsequently “recollected,” “familiar,” and forgotten in-group and out-group faces for subjects with and without a behavioral in-group memory advantage.
See Figure 1 for abbreviations of regions of interest and their locations.
Figure 4.
Mean amplitudes from the test phase depicting recognition-related brain activation for “recollected” and “familiar” old faces and correctly rejected new in-group and out-group faces for subjects with and without a behavioral in-group memory advantage.
Vertical lines highlight the time segment from 300 to 500 ms used for statistical analysis of the FN400 old/new effect. See Figure 1 for abbreviations of regions of interest and their locations.
Figure 5.
Voltage maps of ERP difference waves between “recollected” and “familiar” conditions comparing the FN400 at 300-500 ms and the parietal old/new effect at 600-900 ms for in-group and out-group faces in subjects with and without a behavioral in-group memory advantage.
Spherical spline interpolation was used.
Table 1.
Performance data comparing in-group and out-group faces.
Table 2.
Performance data separately for subjects with and without an in-group memory advantage.