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. Author manuscript; available in PMC: 2009 Jan 15.
Published in final edited form as: Neuroimage. 2007 Sep 19;39(2):894–902. doi: 10.1016/j.neuroimage.2007.09.014

Table 1.

Behavioral responses

Responses per trial (% (SD))
Trial type Button 1 Button 2 Button 3 Button 4 RT (ms)
EP 46 (21) 38 (23) 9 (7) 1 (2) 1902 (295)
EU 6 (7) 19 (10) 44 (16) 26 (18) 1899 (265)
FP 24 (16) 43 (17) 20 (19) 4 (9) 2088 (263)
FU 16 (14) 43 (16) 24 (14) 9 (9) 2087 (295)

EU: emotion rating on unpleasant pictures, EP: emotion rating on pleasant pictures, FU: frequency rating on unpleasant pictures, FP: frequency rating on pleasant pictures. Responses < 500 ms were excluded from RT analysis as they most likely reflected carried-over late responses to previous trials. Two-way repeated measures ANOVA of reaction time using the factors task and valence revealed a significant main effect of task (F (1, 14) = 36.5, p < 0.001).