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. Author manuscript; available in PMC: 2009 Sep 2.
Published in final edited form as: Vision Res. 2007 May 17;47(14):1907–1923. doi: 10.1016/j.visres.2007.03.018

Figure 7.

Figure 7

Psychometric functions when a pre-cue indicated which element set was to be reported and when there was no pre-cue. Each function shows the proportion of trials in which the target discs were judged as having a larger mean size than the reference (fixation) disc as a function of the mean area of the target disc set. Data were fit by Weibull functions obtained using the Psignifit algorithm (Wichman & Hill, 2001). Target elements were to the left or right of fixation. Each datum point in the psychometric functions is based on approximately 40 observations.