scholarly journals Pre-saccadic remapping is an attentional process

2016 ◽  
Vol 16 (12) ◽  
pp. 113
Author(s):  
Martin Szinte ◽  
Dragan Rangelov ◽  
Donatas Jonikaitis ◽  
Heiner Deubel
Keyword(s):  
Attentional Process ◽  
Saccadic Remapping

scholarly journals Pre-saccadic remapping relies on dynamics of spatial attention

2018 ◽  
Author(s):  
Martin Szinte ◽  
Donatas Jonikaitis ◽  
Dragan Rangelov ◽  
Heiner Deubel
Keyword(s):  
Visual Attention ◽  
Temporal Dynamics ◽  
Receptive Fields ◽  
Spatial Location ◽  
Visual Scene ◽  
Attentional Allocation ◽  
Attentional Resources ◽  
Attentional Process ◽  
Spatial And Temporal Dynamics ◽  
Saccadic Remapping

SummaryEach eye movement shifts the projections of the visual scene on the retina. It has been proposed that the receptive fields of neurons in oculomotor areas are remapped pre-saccadically to account for these shifts. While remapping of the whole visual scene seems prohibitively complex, selection by visual attention may limit these processes to a subset of attended locations. Because attentional selection consumes time, remapping of attended locations should evolve in time, too. In our study, we cued a spatial location by presenting an attention capturing cue at different times before a saccade and constructed detailed maps of attentional allocation across the visual field. We observed no remapping when the cue appeared shortly before saccade. In contrast, when the cue appeared sufficiently early before saccade, attentional resources were reallocated to the remapped location. Our results suggest that pre-saccadic remapping is an attentional process relying on the spatial and temporal dynamics of visual attention.

Saliency-based Rhythmic Coordination of Perceptual Predictions

2020 ◽  
Vol 32 (2) ◽  
pp. 201-211 ◽  
Author(s):  
Qiaoli Huang ◽  
Huan Luo
Keyword(s):  
Temporal Dynamics ◽  
Theta Band ◽  
Behavioral Profile ◽  
Fine Grained ◽  
Attentional Process ◽  
Behavioral Measurement ◽  
Processing Resources ◽  
Rhythmic Coordination ◽  
The Brain ◽  
Different Levels

Objects, shown explicitly or held in mind internally, compete for limited processing resources. Recent studies have demonstrated that attention samples locations and objects rhythmically. Interestingly, periodic sampling not only operates over objects in the same scene but also occurs for multiple perceptual predictions that are held in attention for incoming inputs. However, how the brain coordinates perceptual predictions that are endowed with different levels of bottom–up saliency information remains unclear. To address the issue, we used a fine-grained behavioral measurement to investigate the temporal dynamics of processing of high- and low-salient visual stimuli, which have equal possibility to occur within experimental blocks. We demonstrate that perceptual predictions associated with different levels of saliency are organized via a theta-band rhythmic course and are optimally processed in different phases within each theta-band cycle. Meanwhile, when the high- and low-salient stimuli are presented in separate blocks and thus not competing with each other, the periodic behavioral profile is no longer present. In summary, our findings suggest that attention samples and coordinates multiple perceptual predictions through a theta-band rhythm according to their relative saliency. Our results, in combination with previous studies, advocate the rhythmic nature of attentional process.

Selective attention in pigeon temporal discrimination

2018 ◽  
Vol 72 (2) ◽  
pp. 298-310 ◽  
Author(s):  
Shrinidhi Subramaniam ◽  
Elizabeth G E Kyonka
Keyword(s):  
Experimental Investigation ◽  
Selective Attention ◽  
Conditional Probability ◽  
Temporal Discrimination ◽  
Functional Relation ◽  
Discrimination Accuracy ◽  
Gaussian Functions ◽  
Attentional Process ◽  
Highly Correlated ◽  
Light Color

Cues can vary in how informative they are about when specific outcomes, such as food availability, will occur. This study was an experimental investigation of the functional relation between cue informativeness and temporal discrimination in a peak-interval (PI) procedure. Each session consisted of fixed-interval (FI) 2- and 4-s schedules of food and occasional, 12-s PI trials during which pecks had no programmed consequences. Across conditions, the phi (ϕ) correlation between key light color and FI schedule value was manipulated. Red and green key lights signaled the onset of either or both FI schedules. Different colors were either predictive (ϕ = 1), moderately predictive (ϕ = 0.2-0.8) or not predictive (ϕ = 0) of a specific FI schedule. This study tested the hypothesis that temporal discrimination is a function of the momentary conditional probability of food; that is, pigeons peck the most at either 2 s or 4 s when ϕ = 1 and peck at both intervals when ϕ < 1. Response distributions were bimodal Gaussian curves; distributions from red- and green-key PI trials converged when ϕ ≤ 0.6. Peak times estimated by summed Gaussian functions, averaged across conditions and pigeons, were 1.85 and 3.87 s; however, pigeons did not always maximize the momentary probability of food. When key light color was highly correlated with FI schedules (ϕ ≥ 0.6), estimates of peak times indicated that temporal discrimination accuracy was reduced at the unlikely interval, but not the likely interval. The mechanism of this reduced temporal discrimination accuracy could be interpreted as an attentional process.

scholarly journals Pre-saccadic remapping relies on dynamics of spatial attention

eLife ◽  
2018 ◽  
Vol 7 ◽  
Author(s):  
Martin Szinte ◽  
Donatas Jonikaitis ◽  
Dragan Rangelov ◽  
Heiner Deubel
Keyword(s):  
Visual Field ◽  
Spatial Attention ◽  
Temporal Dynamics ◽  
Receptive Fields ◽  
Spatial Location ◽  
Visual Scene ◽  
Attentional Allocation ◽  
Attentional Resources ◽  
Spatial And Temporal Dynamics ◽  
Saccadic Remapping

Each saccade shifts the projections of the visual scene on the retina. It has been proposed that the receptive fields of neurons in oculomotor areas are predictively remapped to account for these shifts. While remapping of the whole visual scene seems prohibitively complex, selection by attention may limit these processes to a subset of attended locations. Because attentional selection consumes time, remapping of attended locations should evolve in time, too. In our study, we cued a spatial location by presenting an attention-capturing cue at different times before a saccade and constructed maps of attentional allocation across the visual field. We observed no remapping of attention when the cue appeared shortly before saccade. In contrast, when the cue appeared sufficiently early before saccade, attentional resources were reallocated precisely to the remapped location. Our results show that pre-saccadic remapping takes time to develop suggesting that it relies on the spatial and temporal dynamics of spatial attention.

Spontaneous Focusing On Numerosity and its Relation to Counting and Arithmetic

2014 ◽  
Author(s):  
Minna M. Hannula-Sormunen
Keyword(s):  
Early Childhood ◽  
Primary School ◽  
Learning Difficulties ◽  
Exact Enumeration ◽  
Exact Number ◽  
Attentional Process ◽  
Number Recognition

This chapter reviews recent research investigating children’s Spontaneous Focusing On Numerosity (SFON) and considers the role it might play in the development of counting and arithmetical skills. SFON refers to a process of spontaneously (i.e. not prompted by others) focusing attention on the exact number of a set of items or incidents. This attentional process triggers exact number recognition and using the recognized exact number in action. The chapter describes how SFON tendency can be assessed, and suggests the measures of it to be indicators of the amount of a child’s self-initiated practice in using exact enumeration in his or her natural surroundings. The studies show that SFON tendency in early childhood is positively and domain-specifically related to the development of numerical skills up to the end of primary school. Promoting SFON tendency could be a potential way of preventing learning difficulties in mathematics.

Meta-Attention: The Development of Awareness of the Attentional Process

1982 ◽  
Vol 106 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Ann B. Loper ◽  
Daniel P. Hallahan
Keyword(s):  
Attentional Process
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