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. Author manuscript; available in PMC: 2006 Aug 29.
Published in final edited form as: Vision Res. 2005 Jul 11;46(8-9):1210–1220. doi: 10.1016/j.visres.2005.05.008

Fig. 4.

Fig. 4

The effect of sustained and transient attention on threshold (C50) and asymptote (Rmax) for individual observers. The blue squares represent an observer’s parameter estimates in the transient condition vs. neutral, and the red circles represent estimates for sustained condition vs. neutral. Points falling on the dashed line represent unity, where there is no difference between precued and neutral conditions. (A) Threshold (C50) decreased for both sustained and transient covert attention. (B) Asymptote (Rmax) did not change with sustained attention, but increased for all observers with transient attention. (For interpretation of the references to colors in this figure legend, the reader is referred to the web version of this paper.)