Table I.
ERP amplitude and latency for perception of fear versus neutral
| ERP component | Fear | Neutral | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Amplitude by site | Latency by site | Amplitude by site | Latency by site | |||||||||
| Fz | Cz | Pz | Fz | Cz | Pz | Fz | Cz | Pz | Fz | Cz | Pz | |
| 170 ms SOA | ||||||||||||
| P1 | −1.33 (0.57) | −0.96 (1.01) | −.03 (1.29) | 71.61 (15.79) | 73.22 (13.27) | 74.35 (13.50) | −0.62 (1.25) | −1.14 (0.96) | −0.006 (1.69) | 75.13 (9.28) | 75.65 (16.37) | 78.14 (16.29) |
| N1 | −4.70 (1.68) | −4.27 (1.76) | −2.93 (1.97) | 126.90 (13.66) | 124.50 (12.57) | 114.91 (13.21) | −5.44 (1.83) | −5.10 (1.89) | −3.67 (123.65) | 130.88 (11.17) | 131.02 (9.78) | 123.65 (16.95) |
| P2 | .58 (3.06) | 1.73 (3.30) | 5.03 (4.00) | 174.63 (13.85) | 172.76 (16.02) | 177.5 (36.25) | 0.78 (2.65) | 1.41 (3.22) | 3.89 (2.39) | 177.41 (13.5) | 178.04 (13.75) | 170.66 (23.82) |
| N2 | −7.09 (2.78) | −5.03 (3.56) | −.001 (4.94) | 298.74 (25.77) | 241.85 (24.65) | 215.10 (34.08) | −0.67 (3.30) | −5.38 (4.04) | .002 (5.13) | 243.68 (23.34) | 243.88 (26.78) | 226.17 (25.78) |
| P3 | −3.79 (2.82) | −0.96 (3.71) | 5.42 (5.45) | 298.75 (25.77) | 296.75 (38.02) | 283.25 (28.64) | −3.09 (2.73) | 0.11 (1.67) | 4.98 (5.27) | 299.62 (28.39) | 302.46 (37.26) | 280.45 (26.93) |
| N4 | −10.72 (2.48) | −6.14 (3.09) | −2.41 (2.40) | 358.84 (24.84) | 367.56 (20.88) | 364.22 (33.80) | −7.59 (2.65) | −6.11 (2.69) | −2.20 (3.23) | 350.57 (38.42) | 360.36 (24.38) | 375.84 (52.99) |
| 30 ms SOA | ||||||||||||
| P1 | −0.84 (0.52) | −0.88 (0.72) | 0.41 (2.24) | 64.90 (10.62) | 73.19 (18.24) | 73.13 (15.54) | −0.19 (1.25) | −0.38 (0.91) | 0.18 (2.35) | 66.24 (14.25) | 62.72 (16.04) | 71.87 (16.07) |
| N1 | −4.61 (1.59) | −4.31 (1.94) | −2.93 (1.60) | 126.89 (12.37) | 128.77 (22.64) | 127.78 (18.99) | −4.51 (1.39) | −4.25 (2.23) | −3.07 (2.50) | 127.13 (10.59) | 124.94 (13.89) | 126.86 (28.14) |
| P2 | .79 (2.74) | 1.53 (3.11) | 4.36 (4.06) | 177.28 (15.14) | 177.69 (18.33) | 182.56 (36.32) | 0.94 (2.61) | 1.29 (2.77) | 4.08 (3.25) | 178.81 (12.43) | 179.20 (16.97) | 182.14 (32.29) |
| N2 | −6.51 (3.10) | −5.14 (3.75) | −2.65 (3.86) | 245.09 (26.79) | 243.35 (27.85) | 225.22 (40.84) | −5.39 (2.97) | −4.01 (3.24) | −1.83 (3.58) | 244.24 (28.49) | 241.94 (36.21) | 229.09 (47.13) |
| P3 | −1.62 (3.46) | 0.26 (3.41) | 5.73 (4.46) | 336.54 (20.78) | 348.99 (33.53) | 291.90 (40.20) | −1.06 (3.08) | −0.007 (2.07) | 4.88 (4.33) | 338.89 (40.29) | 352.90 (40.05) | 294.01 (51.46) |
| N4 | −2.21 (1.90) | −1.99 (1.76) | −1.21 (2.94) | 428.96 (30.98) | 398.35 (51.82) | 295.56 (8.82) | −1.49 (1.67) | −1.90 (3.44) | −0.14 (3.18) | 423.83 (56.36) | 403.89 (76.75) | 300.77 (27.07) |
| 10 ms SOA | ||||||||||||
| P1 | −0.23 (1.13) | −0.66 (1.04) | 0.36 (1.56) | 51.57 (11.26) | 53.81 (16.50) | 61.48 (22.30) | −0.37 (1.18) | −.06 (0.95) | .51 (1.44) | 60.24 (14.03) | 66.80 (13.19) | 68.94 (12.05) |
| N1 | −5.12 (1.65) | −4.72 (1.93) | −3.66 (2.24) | 128.21 (11.12) | 125.66 (9.64) | 134.98 (24.29) | −4.73 (1.26) | −4.49 (1.39) | −3.76 (2.15) | 130.24 (8.12) | 129.92 (7.86) | 135.29 (23.58) |
| P2 | 1.43 (2.74) | 1.90 (2.93) | 3.60 (4.18) | 176.73 (11.47) | 175.86 (15.55) | 184.45 (30.81) | 2.03 (2.31) | 2.38 (2.72) | 3.93 (4.60) | 175.16 (11.36) | 177.11 (14.81) | 193.45 (31.16) |
| N2 | −7.56 (3.45) | −5.96 (4.09) | −2.50 (5.53) | 243.52 (23.29) | 245.3 (25.45) | 249.47 (37.92) | −6.19 (3.20) | −4.85 (3.81) | −2.80 (4.55) | 247.94 (24.31) | 246.27 (27.74) | 241.87 (43.33) |
| P3 | −1.33 (3.08) | 0.177 (3.63) | 4.46 (4.72) | 326.67 (27.75) | 334.88 (26.69) | 279.73 (22.48) | −0.92 (3.50) | 1.00 (3.40) | 4.98 (4.70) | 331.96 (33.07) | 333.84 (21.48) | 298.22 (36.58) |
| N4 | −4.17 (2.47) | −3.13 (1.92) | −1.91 (1.76) | 382.04 (56.48) | 404.34 (51.77) | 292.78 (12.28) | −3.38 (2.64) | −2.12 (3.04) | −1.04 (4.33) | 388.75 (50.14) | 399.25 (67.64) | 306.03 (31.14) |
Values are means (SD).
170 ms SOA, conscious; 30 ms SOA, nonconscious discrimination; 10 ms SOA, nonconscious detection; Fz, Cz, Pz, midline sites.