It is clear that early visual processing provides an image-based representation of the visual
scene: Neurons in Striate cortex (V1) encode nothing about the meaning of a scene, but they …

A recent intrinsic signal optical imaging study in tree shrew showed, surprisingly, that the
population response of V1 to plaid patterns comprising grating components of equal contrast …

Both spatial and temporal context influence our perception of visual stimuli. For instance,
both nearby moving stimuli and recently viewed motion can lead to biases in the perceived …

Little is known about the way in which the outputs of early orientation-selective neurons are
combined. One particular problem is that the number of possible combinations of these …

We investigate if adapting to colored plaids produces a McCollough effect on plaids or
gratings and if adapting to colored gratings produces a McCollough effect on plaids. We find …

May and Zhaoping (this issue) make the case that neurons must be performing multiplication
in order to generate the AND gates needed to detect conjunctions and that the method of …

Temporal information in a scene is thought to be an important cue for visual grouping of
local image features into a single object. The majority of studies on this topic have attempted …

A plaid is a combination of two gratings whose orientations are orthogonal to each other with
the same or similar contrasts. We used plaid patterns as stimuli to investigate the …

An object's shape is a strong cue for visual recognition. Most models of shape coding
emphasize the role of oriented lines and curves for coding an object's shape. Yet inflection …

Plaids consist of two orthogonally oriented gratings. However, their structure may be
perceived as a checkerboard with an oblique orientation or as two overlaid gratings. We …