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Visual crowding, the difficulty of recognizing elements when surrounded by similar items, is a widely studied perceptual phenomenon and a trademark characteristic of peripheral vision. Perceptual Learning (PL) has been shown to reduce crowding, although a large number of sessions is required to observe significant improvements. Recently, transcranial random noise stimulation (tRNS) has been successfully used to boost PL in low-level foveal tasks (e.g., contrast detection, orientation) in both healthy and clinical populations. However, no studies so far combined tRNS with PL in peripheral vision during higher-level tasks. Thus, we investigated the effect of tRNS on PL and transfer in peripheral high-level visual tasks. We trained two groups (tRNS and sham) of normal-sighted participants in a peripheral (8° of eccentricity) crowding task over a short number of sessions (4). We tested both learning and transfer to untrained spatial locations, orientations, and tasks (visual acuity). After training, the tRNS group showed greater learning rate with respect to the sham group. For both groups, learning generalized to the same extent to the untrained retinal location and task. Overall, this paradigm has potential applications for patients suffering from central vision loss but further research is needed to elucidate its effect (i.e., increasing transfer and learning retention).
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Studies of perceptual learning have revealed a great deal of plasticity in adult humans. In this study, we systematically investigated the effects and mechanisms of several forms (trial-by-trial, bloc...
Perceptual learning is often interpreted as learning of fine stimulus templates. However, we have proposed that perceptual learning is more than template learning, in that more abstract statistical ru...
We used a letter transposition (LT) technique to investigate letter position coding during reading in central and peripheral vision. Eighteen subjects read aloud sentences in a rapid serial visual pre...
The view that better perceptual skills can open the door to greater cognitive fitness calls for identifying interventions that enhance perception. We review here the impact of action video game play o...
Perceptual learning refers to improved perceptual performance after intensive training and was initially suggested to reflect long-term plasticity in early visual cortex. Recent behavioral and neuroph...
Interventional, prospective, randomized, double-blind, placebo-controlled and parallel assignment study, in which patients with Autism Spectrum Disorder (ASD) are two types of intervention...
The main objective of this study is to evaluate the effects of tRNS while undergoing computerized cognitive rehabilitation therapy to conclude if this combination of therapies would be eff...
To compare the effects of perceptual learning with patching on improving visual acuity and contrast sensitivity in payient with anisometropic amblyopia.
Stroke is the number one cause of disability in the United Nations with about 1 million new cases each year. Following stroke, patients with perceptual and cognitive impairments have the w...
Aging impacts our unisensory perceptual abilities as well as our ability to correctly combine signals from multiple sensory modalities to obtain a coherent percept of external events. Elde...
The interference of one perceptual stimulus with another causing a decrease or lessening in perceptual effectiveness.
Process in which individuals take the initiative, in diagnosing their learning needs, formulating learning goals, identifying resources for learning, choosing and implementing learning strategies and evaluating learning outcomes (Knowles, 1975)
Photosensitive afferent neurons located in the peripheral retina, with density increases radially away from the FOVEA CENTRALIS. Being much more sensitive to light than the RETINAL CONE CELLS, the rod cells are responsible for twilight vision (at scotopic intensities) as well as peripheral vision, but provide no color discrimination.
Mental activity, not predominantly perceptual, by which one apprehends some aspect of an object or situation based on past learning and experience.
Vision considered to be inferior to normal vision as represented by accepted standards of acuity, field of vision, or motility. Low vision generally refers to visual disorders that are caused by diseases that cannot be corrected by refraction (e.g., MACULAR DEGENERATION; RETINITIS PIGMENTOSA; DIABETIC RETINOPATHY, etc.).