Table 1.
Example of questions related to the documentary content administered to participants right after the end of the video (memory test).
Fig 1.
Example of Congruent, Incongruent and Neutral sentences used in the language task. ERPs were time-locked to terminal words which were presented in uppercase for 1000 ms.
Fig 2.
Subtle and Blatant Prejudice Scale.
Scores obtained on the Subtle and Blatant Prejudice Scale by the two experimental groups. Scores could range from 1 (minimum prejudice) to 5 (maximum prejudice); for both groups, explicit prejudice (blatant) was significantly lower than the implicit one (subtle).
Table 2.
Summary of the results of the T-test comparisons on the scores obtained at the Subtle and Blatant Prejudice Scale across the two experimental groups.
Fig 3.
Topographical distribution of the differential voltage (Incongruent–Congruent) recorded between 350 and 550 ms post-stimulus and ERP waveforms recorded at frontal sites in response to Congruent, Incongruent and Neutral sentences; The top figure (a) shows results in the “Nature” group; the bottom figure (b) in the “People” group.
Fig 4.
Grande average ERP waveforms recorded at anterior frontal sites in response to congruent, incongruent and neutral sentences.
The time windows corresponding to the N400 (350–550 ms), P300 (500–600 ms) and frontal positivity (fLP; 650–800 ms) are highlighted. On the left recordings from the “Nature” group; on the right from the “People” group.
Fig 5.
P300 and fLP topographical maps.
Isocolor topographical maps of the voltage distribution (top view) of brain potentials in the time windows corresponding to the P300 (500–600 ms) and frontal late positivity (fLP; 650–800 ms).
Table 3.
P300 mean amplitude values recorded in the 500–600 ms time window in response to congruent, incongruent, and neutral terminal words, at anterior and front-central sites (AFF1, AFF2, AFZ, FCZ, FZ).
Fig 6.
The most active sources relative to the ERP difference-waves (incongruent minus congruent) recorded in the 350–550 time-window (N400) in the “Nature” group were the Superior Frontal Gyrus (SFG) and the Inferior Temporal Gyrus (ITG).
Table 4.
Source reconstruction of N400 response to stereotype violation.