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. Author manuscript; available in PMC: 2009 May 7.
Published in final edited form as: Brain Res. 2008 Apr 2;1208:137–149. doi: 10.1016/j.brainres.2008.02.015

Figure 4.

Figure 4

Experimental Design. A picture of a real object was presented on a computer screen for 600 ms. The picture remained visible while a word or environmental sound was presented via loudspeakers. The auditory stimulus either matched or mismatched the visual stimulus. Once the auditory stimulus was complete, the picture disappeared from the computer screen and was replaced by a fixation cross, which remained visible until subjects recorded their response with a button press. Trial length was variable, being a combination of stimulus presentation (approximately 900–1700 ms), reaction time (M = 790–1079 ms), and variable inter-stimulus interval (ISI; 800–950 ms), which was calculated from the onset of the subject’s button press. The happy face sticker always represented a match trial response and the sad face sticker always represented a mismatch trial response. Half of the subjects had the happy face button on the right side of the button box, and the other half had it on the left side.