2.3.4. ERP Amplitude Analysis
The ERP component of central interest was the N250. In order to quantify
this component, ERP epochs were averaged separately for the first and
second half of the EEG session and per condition. Conditions were the
target face and the non-target faces divided into high- versus
low-distinctive ones. Since the own face ERPs were not relevant for the
present questions, we will not report them here. The N250 component was
measured as in Sommer et al. (2021) but limited to the subset of
electrodes available, that is, to the averaged channels TP9, P7, PO7,
O1, TP10, P8, PO8, and O2, in which the N250 amplitude was measured
between 230 and 320 ms.