The Specificity of Processing in Prefrontal Cortex: From Problem Solving to Reaction Times

submitted by: TandF
The 39th Sir Frederick Bartlett Memorial Lecture given by Prof Tim Shallice at the January 2011 meeting of the Experimental Psychology Society, University College London, 6 January 2011. A selection of previous Bartlett Lectures published in Quarterly Journal of Experimental Psychology are now available to download or read online here . A selection of published articles by Prof Tim Shallice can be found here . Visit the Experimental Psychology Society at .

Conspicuity of moving soldiers

submitted by: alexandertoet
The construction and validation of soldier combat models requires data on the conspicuity of camouflaged targets in the field, and human targets in particular. So far, this data is lacking. Also, it is currently unknown to what degree luminance contrast and motion contribute to target conspicuity. These data are needed to enable the validation and further development of human visual search performance modules in soldier combat models like SCOPE or IWARS. In this study we measured the...

Matched filtering determines human visual search in natural images

submitted by: alexandertoet
The structural image similarity index (SSIM), introduced by Wang and Bovik (IEEE Signal Processing Letters 9-3, pp. 81-84, 2002) measures the similarity between images in terms of luminance, contrast en structure. It has successfully been deployed to model human visual perception of image distortions and modifications in a wide range of different imaging applications. Chang and Zhang (Infrared Physics & Technology 51-2, pp. 83-90, 2007) recently introduced the target structural...

The role of vision in detecting and correcting fingertip force errors during object lifting

submitted by: gbucking
Vision provides many reliable cues about the likely weight of an object, allowing individuals to predict how heavy it will be. The forces used to lift an object for the first time reflect these predictions. This, however, leads to inevitable errors during lifts of objects that weigh unexpected amounts. Fortunately, these errors are rarely made twice in a row—lifters have the impressive ability to detect and correct large or small misapplications of fingertip forces, even while experiencing...
Authors: Gavin Buckingham, Nathalie s. Ranger, Melvyn a. Goodale

Motion processing with two eyes in three dimensions

submitted by: rokers
The movement of an object toward or away from the head is perhaps the most critical piece of information an organism can extract from its environment. Such 3D motion produces horizontally opposite motions on the two retinae. Little is known about how or where the visual system combines these two retinal motion signals, relative to the wealth of knowledge about the neural hierarchies involved in 2D motion processing and binocular vision. Canonical conceptions of primate visual processing...
Authors: Alexander c. Huk, Lawrence k. Cormack, Thaddeus b. Czuba, Bas Rokers

Reducing backward masking through action game training

submitted by: renjieli
Action video game play enhances basic visual skills such as crowding acuity and contrast sensitivity (C. S. Green & D. Bavelier, 2007; R. Li, U. Polat, W. Makous, & D. Bavelier, 2009). Here, we ask whether the dynamics of perception may also be altered as a result of playing action games. A backward masking paradigm was used to test the hypothesis that action video game play also alters the temporal dynamics of vision. As predicted, action gamers showed reduced backward masking...
Authors: Renjie Li, Uri Polat, Fabien Scalz, Daphne Bavelier