Perception

Pure Pedantry

Category archives for Perception

There is a fascinating case study in Current Biology. de Gelder et al. discuss a patient — referred to as TN to protect his privacy — who had two sequential strokes that damaged his brain. The parts of the brain that were damaged included the primary visual cortex in both hemispheres — rendering the patient…

Caught this bad description of an otherwise very interesting study at Science Daily: Neuroscientists at Georgetown University Medical Center have, for the first time, shown what brain activity looks like when someone anticipates an action or sensory input which soon follows. In the February 25 issue of the Journal of Neuroscience, they say this neural…

I caught this neuroscience question over at a new blog I like, Think Markets. Sandy Ikeda comments on a section of Daniel Gilbert’s book Stumbling on Happiness: I’ve been thinking about the following from Daniel Gilbert’s Stumbling on Happiness: Experiments have demonstrated that the moment we encounter an object, our brains instantly analyze just a…

Farris et al. have a paper coming out in Psychological Science about how men tend to misperceive sexual interest in women. I get the sense that this is a big problem for many women. Any woman who has spent more than 30 seconds in a bar has had at least one random yo-yo hit on…

Features and Attention Are Coded in V1

Vision is the process by which the brain converts the light stimuli into a mental world filled with abstract visual objects. If you stop to think about it, this is an incredible feat. There is nothing in the photons coming from two neighboring sections of an object that implies that they should go together; rather…

Functional MRI (fMRI) is a very useful technique, but it lacks in resolution making some systems difficult to study. Adams et al. show in a study of ocular dominance columns in humans why good old staining is still useful when we reach the limits of imaging.

This is the best advertisement for a video game ever. The researchers compared people who played Unreal Tournament for 30 hours with people who played Tetris. They found that the Unreal Tournament players had an increase in visual processing speed: Video games that contain high levels of action, such as Unreal Tournament, can actually improve…

Perceptual binding takes time

The binding problem is one of the great mysteries of modern neuroscience. Briefly, we know from a variety of studies in humans and primates that the specific features of the sensory world — particularly the visual world — are broken down into their separate components by the brain to be processed in parallel. This means…