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. Author manuscript; available in PMC: 2013 Sep 1.
Published in final edited form as: Biol Psychol. 2012 May 27;91(1):103–110. doi: 10.1016/j.biopsycho.2012.05.002

Table 1.

Mean physiological reactivity for faces and scenes, by social anxiety group.

Low social anxiety (n=30) High social anxiety (n=30)
Pleasant Neutral Unpleasant Pleasant Neutral Unpleasant
Skin conductance (uSiemens)
 Faces 0.1(0.03) 0.1(0.03) 0.1(0.03) 0.1(0.04) 0.1(0.03) 0.2(0.04)
 Scenes 0.2(0.03) 0.1(0.03) 0.2(0.05) 0.2(0.09) 0.1(0.06) 0.3(0.1)
Late positive potential (uVolts)
 Faces 2.3(0.3) 1.7(0.3) 2.1(0.5) 1.8(0.3) 1.6(0.4) 1.9(0.2)
 Scenes 3.8(0.5) 2.0(0.3) 3.4(0.5) 3.3(0.4) 1.5(0.4) 2.8(0.4)
Probe P300 (uVolts)
 Faces 3.5(0.3) 3.4(0.3) 3.3(0.4) 2.1(0.4) 3.4(0.5) 3.4(0.6)
 Scenes 0.7(0.3) 3.2(0.4) 1.3(0.2) 0.4(0.3) 2.4(0.5) 1.5(0.5)
Startle magnitude (T-score)
 Faces 48.1(0.8) 47.6(1.1) 47.5(0.9) 48.8(0.7) 46.8(0.7) 48.7(0.8)
 Scenes 46.1(0.9) 49.3(0.9) 50.0(1.2) 46.8(1.0) 48.3(0.8) 50.4(0.8)

Note. Mean (s.d.) activity within each psychphysiological measure when high and low socially anxious participants viewed Happy (Pleasant), Neutral, and Angry (Unpleasant) facial expressions, and Pleasant, Neutral, and Unpleasant scenes.