Table 1 shows the types of stimuli used in this study. Participants were seated approximately 1.1 m in front of a computer screen in a dimly lit, soundproofed, and electrically shielded room. Following the procedure used by Gong et al. (2013) (link), four pure tone stimuli (1,000 Hz vs. 2,000 Hz; 55 dB vs. 59 dB) were created using Adobe Audition 3.0 and verified using Praat. Pure tones with a duration of 375 ms were binaurally presented via Sennheiser headphones. The sound pressure level was monitored through a digital sound level meter.
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