Figure 3From: Electrophysiological correlates of associative learning in smokers: a higher-order conditioning experimentSmokers' (upper) and non-smokers' ERPs (lower) in response to CS2 smoke and CS2 neutral in Block 1 and Block 2. Current Source Density (CSD) maps represent differences in activity between CS2smoke and CS2neutral in the 280-500 ms timeframe (P3) and the 200-280 ms timeframe (P2).Back to article page