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Spatial IOR as a function of fixation history, task and spatial references

Partial paradigm

In oculomotor selection, each saccade is thought to be automatically biased towards uninspected locations, inhibiting the inefficient behavior of repeatedly re-fixating the same objects. This automatic bias is related to inhibition of return (IOR). Although IOR seems an appealing property that increases efficiency in visual search, such a mechanism would not be efficient in other tasks. Indeed, evidence for additional, more flexible control over re-fixations has been provided.

Oculomotor interference of bimodal distractors

HeemanEtAl2016_Fig1_Clipped

Audiovisual distractors interfere with the correct programming of a saccade to a target. In this new study, we show that bimodal distractors evoke stronger oculomotor competition compared to unimodal distractors. We developed an elegant setup in which visual and auditory stimuli could be presented in spatial and temporal alignment to explore the influence of visual, auditory and audiovisual distractors on eye movements.

The pupillary light response reflects encoding, but not maintenance, in visual working memory

The pupillary light response has been shown not to be a purely reflexive mechanism, but to be sensitive to higher order perceptual processes, such as covert visual attention. In a new study we examined whether the pupillary light response is modulated by stimuli which are not physically present, but maintained in visual working memory.

Writing with your mind's eye: Researchers develop a way to write text through changes in the size of the eye's pupil

pupil

Researchers from CNRS / Aix-Marseille University (France) and Utrecht University (Netherlands) have developed a way to—literally—write text by thinking of letters. In this technique, several letters are presented on a computer screen. The color of these letters continuously changes from white to black and back again, in different patterns.

Visual input signaling threat gains preferential access to awareness (new paper by Surya Gayet)

Visual input that signals threat is inherently relevant to behavior. Accordingly, it has been demonstrated that threatening stimuli elicit faster behavioral responses than non-threatening stimuli. Considering that awareness is a prerequisite for performing demanding tasks and guiding novel behavior, visual input can be more adequately acted upon once it reaches awareness.

The relative contributions of multisensory integration and crossmodal exogenous spatial attention to multisensory response enhancement (New paper)

VanderStoepSpenceNijboerVanderStigchel2015

The localization of multisensory information is generally faster than that of unisensory information when the unimodal components of a multisensory stimulus are spatially and temporally aligned. Two processes that can cause multisensory response enhancement are multisensory integration and crossmodal exogenous spatial attention.

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