http://gru.stanford.edu/ 2026-05-15T00:20:42-0700 http://gru.stanford.edu/ http://gru.stanford.edu/lib/tpl/gru/images/favicon.ico text/html 2022-08-30T13:40:30-0700 Anonymous (anonymous@undisclosed.example.com) http://gru.stanford.edu/doku.php/shared/research/attention?rev=1661892030&do=diff Attentional enhancement via selection and pooling of early sensory responses in human visual cortex Our world is filled with multiple distractions - flashing images on a television screen, blinking lights, blaring horns. How is our brain able to focus attention only on relevant stimuli? The brain might turn up the sensory gain of responses (B above) or turn down noise in sensory cortical circuits responding to the relevant stimulus (C above) - thus enhancing our sensitivity. Alternatively (or in… text/html 2022-08-30T13:40:30-0700 Anonymous (anonymous@undisclosed.example.com) http://gru.stanford.edu/doku.php/shared/research/old?rev=1661892030&do=diff Overview Overview: Priors in visual perception Vision is a fabrication of our minds. Sensory information from our eyes is often ambiguous or limited, yet vision is remarkably robust and surprisingly able to correctly interpret impoverished sensory signals. What cortical computations make this possible? In the framework of Bayesian statistical decision theory; how does the cortex combine sensory evidence from the eyes with priors or expectations to form percepts? Priors may be short term and si… text/html 2022-08-30T13:40:30-0700 Anonymous (anonymous@undisclosed.example.com) http://gru.stanford.edu/doku.php/shared/research/vintch?rev=1661892030&do=diff Cortical correlates of human motion perception biases Human sensory perception is not a faithful reproduction of the sensory environment. For example, at low contrast, objects appear to move slower and flicker faster than veridical. While these biases have been robustly observed, their neural underpinning are unknown, thus suggesting a possible disconnect of the well established link between motion perception and cortical responses. We used functional imaging to examine the encoding of speed in…