Stimuli were generated using
MATLAB (Mathworks, Natick, MA, USA) and Psychtoolbox extensions (Brainard, 1997 (
link); Pelli, 1997 (
link)). The visual stimulus was a stationary white circle with a diameter of 3.5° presented on a grey background in the center of the screen. Auditory stimuli were pure tones of 1000 Hz created in
MATLAB and presented binaurally at 75 dB (measured at the auditory source) via Sennheiser
HD 280 pro headphones laid flat, directly under the center of the display, with earpieces facing the ceiling to approximate the same spatial location as the visual signal. Visual and auditory stimuli were delivered through a
Display ++ system with a refresh rate of 120 Hz and an
AudioFile stimulus processor, respectively (Cambridge Research Systems, Rochester, UK). For all experiments, participants sat in front of the display 60 cm away from the screen.
Scurry A.N., Dutcher D., Werner J.S, & Jiang F. (2019). Age-Related Effects on Cross-Modal Duration Perception. Multisensory research, 32(8), 693-714.