Polarity-sensitive perceptual adaptation to temporal sawtooth modulation of luminance

  title={Polarity-sensitive perceptual adaptation to temporal sawtooth modulation of luminance},
  author={M. Hanly and Donald M. MacKay},
  journal={Experimental Brain Research},
Exposure to a large uniform field modulated in luminance by a sawtooth function, repeating between 1 and 5 times per second, raised the threshold for detection of a test stimulus of similar waveform by a factor of 2 to 4.5. In comparison, the threshold elevation for a test stimulus of the inverse waveform was only half as great. This polarity-sensitive adaptation fits with Jung's hypothesis that separate channels signal ‘brightening’ and ‘darkening’ in the human visual system. Introduction of… CONTINUE READING

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