Table 1

Mean ERP amplitudes and picture ratings
Spider fear (n = 13) No fear (n = 15)
Neutral Negative Spiders Neutral Negative Spiders
EPN picture task 10.04 (5.97) 8.34 (5.53) 8.39 (5.36) 8.96 (3.52) 7.45 (3.06) 8.06 (2.84)
EPN 1-letter task 11.23 (5.69) 9.39 (4.91) 9.50 (5.39) 9.93 (3.69) 8.82 (3.53) 9.41 (3.15)
EPN 3-letter task  9.99 (5.92) 8.75 (5.83) 8.91 (5.56) 8.54 (3.23) 7.73 (3.11) 8.42 (3.11)
EPN 6-letter task  8.87 (4.98) 7.51 (4.98) 7.88 (5.12) 7.52 (3.02) 6.51 (2.77) 7.44 (3.09)
LPP picture task −0.40 (1.99) 1.52 (2.31) 1.82 (2.28) 0.69 (1.33) 2.26 (2.50) 1.57 (1.47)
LPP 1-letter task  0.71 (1.45) 1.60 (2.34) 2.04 (1.84) 1.98 (1.92) 3.02 (2.18) 2.44 (1.94)
LPP 3-letter task  0.55 (1.68) 0.93 (1.49) 1.76 (1.52) 1.78 (1.23) 2.02 (1.85) 2.04 (1.65)
LPP 6-letter task  0.53 (1.48) 1.37 (1.69) 1.45 (1.74) 0.94 (1.46) 1.47 (1.67) 1.37 (1.60)
Valence ratings  5.37 (0.43) 3.73 (0.49) 3.28 (0.89) 5.24 (0.27) 3.55 (0.52) 5.05 (0.96)
Arousal ratings  3.89 (1.36) 5.39 (1.13) 6.21 (1.01) 4.01 (1.17) 5.54 (1.22) 4.19 (1.82)

Mean (and SD) EPN and LPP amplitudes (in μV) and valence and arousal ratings during the four task conditions for neutral, negative, and spider pictures, separately for participants with and without spider fear. For picture ratings, the scales ranged from 1 to 9: For valence, 1 = unpleasant and 9 = pleasant; and for arousal, 1 = low and 9 = high.

Norberg and Wiens

Norberg and Wiens BMC Neuroscience 2013 14:139   doi:10.1186/1471-2202-14-139

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