Skip to main content
. Author manuscript; available in PMC: 2010 May 1.
Published in final edited form as: Vision Res. 2008 Nov 7;49(10):1144–1153. doi: 10.1016/j.visres.2008.09.018

Figure 3. Endogenous attention psychometric functions, data and model predictions from Ling & Carrasco (2006).

Figure 3

Individual observer data, model fits and attentional effect. Black lines and squares represent the neutral-attention condition, red lines and triangles represent the endogenous attention condition. Short-dash lines show the best fit for the mixed model (contrast gain plus response gain), long-dash lines show the best fit for the response gain model. a) Data and psychometric functions estimated by the model. b) Estimated contrast response functions. c) Difference in response between neutral- and endogenous-attention conditions. The best model for endogenous attention is contrast gain; attention shifts the pCRF horizontally towards lower contrast (b) and the difference in population response is highest within the middle of the pCRF (c).