Prefrontal dimension change-related activation differs for visual search in sparse and dense displays.

Changes of the target-defining feature dimension have previously been shown to elicit anterior prefrontal activation increases. In the majority of studies, this change-related activation was observed in the left lateral frontopolar cortex. In at least one study, however, right anterior prefrontal activation was observed.

Perceptual Learning of Object Recognition in Simulated Retinal Implant Perception - The Effect of Video Training.

Purpose: Retinal implants (RIs) provide new vision for patients suffering from photoreceptor degeneration in the retina. The limited vision gained by RI, however, leaves room for improvement by training regimes.

Methods: Two groups of normal-sighted participants were respectively trained with videos or still images of daily objects in a labeling task.

Contextual-Cueing beyond the Initial Field of View-A Virtual Reality Experiment.

In visual search, participants can incidentally learn spatial target-distractor configurations, leading to shorter search times for repeated compared to novel configurations. Usually, this is tested within the limited visual field provided by a computer monitor. While contextual cueing is typically investigated on two-dimensional screens, we present for the first time an implementation of a classic contextual cueing task (search for a T-shape among L-shapes) in a three-dimensional virtual environment.