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Spatial

The data used is an audio-visual dataset using echo planar images (EPI) acquired using a 3 Tesla system with TR=3 seconds, time to echo (TE) = 30ms, in-plane resolution 4mm and slice thickness 7mm. The first 4 scans were discarded to leave $ N=176$ scans and the data was motion corrected using MCFLIRT (31) and high-pass filtered as described in (43). The stimuli were a reversing checkerboard boxcar stimulus (30 seconds on, 30 seconds off), and an auditory boxcar stimulus (45 seconds on. 45 seconds off). The full signal (HRF) model is used in combination with each of the noise models just described. The different models were fitted to one slice of the data (slice 8 of 20).