Technical Comments

Object Processing in the Infant Brain

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Science  13 Apr 2001:
Vol. 292, Issue 5515, pp. 163a
DOI: 10.1126/science.292.5515.163a


  • Figure 11

    (A) ERPs of young adults (mean age 24.3 years) in response to Kanizsa squares (red) and non-Kanizsa squares (blue), referenced to the left mastoid [from (2)]. (B) ERPs from Fig. 1A, re-referenced to the average of all electrodes, to make the data compatible with the ERPs from Csibraet al. (1). Re-referencing reduced P3 amplitude, but a target P3 (red) remained that looks much like the late positive ERP component for the infants studied by Csibra et al. This result demonstrates that the infants' positivity around 400 ms in response is probably a target P3. N1 amplitudes differ significantly between Kanizsa squares and non-Kanizsa squares, whereas P1 amplitudes do not. (C) Stimuli that were presented: left, a Kanizsa square that had to be counted (target); right, a non-Kanizsa square.

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