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Contrast adaptation of a grating stimulus reduces as the phase of the probe moves further away from the adaptor indicating that the underlying mechanism is tuned for phase. Each data point represents the PSE, determined from a Weibull function fitted to data from 400 trials (200 on each side of fixation). Error bars represent ±1sem of the estimate of the PSE, calculated from 5000 bootstrap resamples of the data (see text for details).
