Research Article

Autistic Traits Affect P300 Response to Unexpected Events, regardless of Mental State Inferences

Table 2

Mean ERP amplitudes (μV) and latencies (ms) on , , and (standard deviants in parentheses).

Belief-ExpectedBelief-UnexpectedNo-belief-ExpectedNo-belief-Unexpected

P100
Amplitude (μV)
 Low AQ2.84 (1.88), 0.27 (1.09), 0.27 (0.75)3.52 (1.94), 0.26 (0.81), 0.26 (1.11)3.01 (1.88), −0.02 (0.76), 0.33 (0.74)2.90 (1.38), 0.61 (0.39), −0.05 (0.57)
 High AQ3.05 (1.68), 0.53 (0.73), 0.02 (0.92)2.90 (1.43), 0.48 (0.91), −0.11 (0.62)3.43 (1.50), 0.58 (0.79), −0.16 (0.74)2.22 (1.18), 0.35 (0.49), −0.32 (0.76)
Latency (ms)
 Low AQ113 (18.1), 107 (36.0), 92.9 (27.8)107 (26.4), 113 (28.7), 112 (33.1)114 (15.5), 107 (27.0), 106 (28.9)110 (19.5), 110 (27.8), 101 (34.6)
 High AQ101 (32.1), 89.8 (34.1), 99.6 (38.5)108 (25.1), 111 (34.9), 85 (22.5)105 (25.3), 107 (27.4), 107 (32.3)105 (23.5), 93.8 (27.4), 87.4 (38.7)

N200
Amplitude (μV)
 Low AQ−0.62 (2.62), −0.2 (1.32), 0.22 (1.01)0.04 (1.76), −0.15 (1.12), 0.36 (1.42)−0.35 (1.55), −0.06 (0.87), 0.22 (0.77)−0.35 (1.55), −0.06 (0.87), 0.35 (0.71)
 High AQ1.11 (2.50), 0.24 (0.96), −0.07 (1.03)0.76 (1.66), 0.24 (0.80), −0.36 (0.57)0.33 (2.67), −0.23 (0.87), −0.25 (−.80)0.33 (2.69), −0.23 (0.87), −0.20 (0.60)
Latency (ms)
 Low AQ186 (13.3), 186 (26.3), 194 (37.2)181 (11.4), 181 (21.6), 208 (35.9)185 (13.8), 179 (17.1), 190 (34.7)188 (16.4), 296 (28.1), 186 (33.6)
 High AQ189 (23.9) 187 (28.9), 210 (29.5)187 (25.5), 186 (29.3), 229 (46.0)204 (27.1), 200 (31.1), 184 (29.7)181 (14.5), 289 (26.6), 183 (26.7)

P300
Amplitude (μV)
 Low AQ4.46 (2.80), 1.52 (0.95). 0.51 (0.68)5.96 (1.64), 1.78 (0.89), 0.50 (1.36)5.07 (3.29), 1.10 (0.78), 0.59 (0.68)5.19 (2.05), 1.40 (0.97), 0.91 (0.63)
 High AQ5.76 (2.81), 2.15 (1.11), 0.03 (1.19)5.52 (3.25), 2.19 (0.72), −0.13 (0.59)5.52 (3.87), 1.56 (1.25), 0.36 (0.67)4.48 (3.69), 1.27 (0.87), 0.65 (0.66)
Latency (ms)
 Low AQ284 (27.6), 310 (33.8), 284 (44.6)285 (22.2), 300 (16.8), 263 (34.2)273 (20.2), 284 (34.1), 283 (36.0)282 (26.2), 287.6 (40.1), 285 (40.0)
 High AQ288 (27.8), 306 (28.5), 285 (41.1)287 (39), 301 (22.7), 264 (31.9)288 (28.7), 303 (20.7), 308 (41.59)287 (29.6), 298 (32.3), 295 (37.7)