Grey Scales Test
Alternate Names: Gray Scales Test
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Grey Scales Test
A simple perceptual test to test attentional bias in unilateral patients and healthy controls using mirror gradient rectangle pairs (the 'gray scales'). Normal adults tend to show a slight left bias (Mattingley et al, 2004) despite the images having the same brightness overall.
References
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Mattingley, J. B., Bradshaw, J. L., Nettleton, N. C., & Bradshaw, J.A. (1994). Can task specific perceptual bias be distinguished from unilateral neglect? Neuropsychologia, 32, 805–817.
Mattingley, J. B., Berberovic, N., Corben, L., Slavin, M. J., Nicholls, M. E. R., & Bradshaw, J. L. (2004). The greyscales task: a perceptual measure of attentional bias following unilateral hemispheric damage. Neuropsychologia, 42(3), 387–394. https://doi.org/10.1016/j.neuropsychologia.2003.07.007
Loftus, A. M., Vijayakumar, N., & Nicholls, M. E. R. (2009). Prism adaptation overcomes pseudoneglect for the greyscales task. Cortex, 45(4), 537–543. https://doi.org/10.1016/j.cortex.2007.12.011
Thomas, N. A., & Elias, L. J. (2012). Perceptual asymmetries in greyscales: Object-based versus space-based influences. Cortex, 48(5), 553–562. https://doi.org/10.1016/j.cortex.2010.11.015
Giglhuber, K., Maurer, S., Zimmer, C., Meyer, B., & Krieg, S. M. (2018). Mapping visuospatial attention: the greyscales task in combination with repetitive navigated transcranial magnetic stimulation. BMC Neuroscience, 19(1), 40–40. https://doi.org/10.1186/s12868-018-0440-1