Critical Flicker-Fusion of Solid and Annular Stimuli

@article{Robinson1970CriticalFO,
  title={Critical Flicker-Fusion of Solid and Annular Stimuli},
  author={Daniel N. Robinson},
  journal={Science},
  year={1970},
  volume={167},
  pages={207 - 208}
}
Critical flicker-fusion thresholds were measured with both solid disks and annular stimuli. The former subtended 1, 4, and 8 degrees of visual angle, and the latter subtended 4 and 8 degrees. The illuminated region of the 4-degree annulus provided the same area of stimulation as that of the 1-degree disk. The illuminated region of the 8-degree annulus provided the same area of stimulation as the 4-degree disk. Annular stimuli significantly reduced critical flicker-fusion thresholds relative to… 
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We thank H. Waters and W. Henderson for technical assistance
    Herkenham for assistance in the conduct of this research