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. Author manuscript; available in PMC: 2012 Sep 15.
Published in final edited form as: Vision Res. 2011 Aug 9;51(18):1995–2007. doi: 10.1016/j.visres.2011.06.020

Table 1.

Critical cutoffs (defined as the minimum cutoff to achieve 80% recognition accuracy) and parameter values of the psychometric functions for four different stimulus conditions (n =18).

Critical Cutoff
(CPL)		 α
(scale parameter)		 β
(shape parameter)
Lowercase in the fovea 0.90 (±0.01) 0.47 (±0.004) 0.15 (±0.006)
Lowercase in the periphery 1.06 (±0.02) 0.55 (±0.011) 0.19 (±0.008)
Uppercase in the fovea 1.14 (±0.02) 0.63 (±0.007) 0.15 (±0.005)
Uppercase in the periphery 1.36 (±0.02) 0.73 (±0.013) 0.21 (±0.007)