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. 2012 Jun 8;8(6):678–687. doi: 10.1093/scan/nss052

Table 2.

Differential activation evoked by negative vs neutral emotional pictures (ERPnegative − ERPneutral) for the three different groups

LSMs for valence effect (negative–neutral difference)a in each group: P-values (Cohen d)
 Group difference LSM for valence effect: P-values
Scalp region HC (n = 28) NVS (n = 21) VS (n = 21) HC-NVS HC-VS NVS-VS
P35
    Front 0.17 (0.31) 0.55 (−0.14) 0.26 (0.31) 0.17 0.97 0.21
    Cent 0.016* (0.51) 0.32 (−0.21) 0.47 (0.17) 0.02* 0.33 0.23
    Pari 0.007* (0.55) 0.32 (−0.21) 0.46 (0.17) 0.01* 0.25 0.23
    Temp 0.006* (0.64) 0.12 (−0.37) 0.97 (0.01) 0.003* 0.11 0.28
    Occi 0.004* (0.56) 0.76 (−0.06) 0.67 (0.09) 0.02b 0.13 0.61
P100
    Front <0.0001*** (0.96) 0.27 (0.27) 0.61 (0.13) 0.04b 0.005* 0.26
    Cent <0.0001*** (1.06) 0.12 (0.34) 0.99 (0.0001) 0.02* 0.002* 0.29
    Pari <0.001** (0.92) 0.14 (0.3) 0.41 (0.18) 0.02b 0.02* 0.69
    Temp <0.0001** (1.01) 0.33 (0.21) 0.64 (0.11) 0.01* 0.01* 0.76
    Occi <0.0002** (0.69) 0.07 (0.34) 0.45 (0.15) 0.18 0.06 0.49
N100
    Front 0.005* (0.45) 0.0004** (0.59) 0.87 (−0.03) 0.45 0.07 0.01*
    Cent 0.0002** (0.54) 0.0001*** (0.65) 0.89 (0.04) 0.53 0.02* 0.004*
    Pari 0.0001*** (0.63) 0.0001*** (0.71) 0.36 (0.14) 0.64 0.02* 0.006*
    Temp 0.0001*** (0.81) 0.0001*** (0.74) 0.31 (0.19) 0.99 0.01* 0.01*
    Occi 0.0001*** (0.74) 0.0001*** (0.77) 0.22 (0.15) 0.86 0.006* 0.002*
ESP
    Front 0.18 (0.11) 0.15 (0.13) 0.61 (0.05) 0.89 0.66 0.56
    Cent 0.01* (0.21) 0.008* (0.24) 0.03* (0.21) 0.79 0.96 0.77
    Pari 0.0001*** (0.34) 0.0002** (0.35) 0.002** (0.31) 0.91 0.83 0.74
    Temp 0.002* (0.26) 0.0004** (0.32) 0.001** (0.32) 0.57 0.65 0.95
    Occi 0.0001*** (0.43) 0.0001*** (0.37) 0.006** (0.27) 0.61 0.24 0.45
LSP
    Front 0.03* (0.15) 0.24 (−0.08) 0.41 (−0.06) 0.02b 0.04b 0.98
    Cent 0.0001*** (0.41) 0.009* (0.18) 0.01* (0.18) 0.02b 0.06 0.77
    Pari 0.0001*** (0.53) 0.0001*** (0.42) 0.0001*** (0.34) 0.25 0.08 0.45
    Temp 0.0001*** (0.35) 0.0001*** (0.27) 0.008** (0.21) 0.39 0.13 0.43
    Occi 0.0001*** (0.51) 0.0001*** (0.51) 0.0006** (0.27) 0.95 0.03b 0.02b

aHLM.

bEffect becomes marginally significant after adjustment for multiple comparisons.

*P ≤ 0.05, **P ≤ 0.001, ***P ≤ 0.0001.