The Contribution of Attention to the Right Visual Field Advantage for Word Recognition

1998 ◽  
Vol 38 (3) ◽  
pp. 339-357 ◽  
Author(s):  
Michael E.R. Nicholls ◽  
Amanda G. Wood
Keyword(s):  
Visual Field ◽  
Word Recognition ◽  
Right Visual Field ◽  
The Right

Superiority of the Left Cerebral Hemisphere in Word Recognition with Nonverbal Central Fixation

1984 ◽  
Vol 59 (3) ◽  
pp. 895-898
Author(s):  
Stephen Meredith Williams
Keyword(s):  
Visual Field ◽  
Word Recognition ◽  
Cerebral Hemisphere ◽  
Right Visual Field ◽  
Left Cerebral Hemisphere ◽  
Bilateral Presentation ◽  
Fixation Task ◽  
The Right ◽  
Central Fixation

The right visual-field advantage for bilateral presentation put forward by McKeever and Huling was investigated. The central-fixation task was varied so that in one condition this task was nonverbal. Results gave some support for scanning-type explanations in this paradigm but over-all favoured Kinsbourne's activation-and-priming account.

Analysis of Superiority of the Right Visual Field in Bilateral Tachistoscopic Word-Recognition

1976 ◽  
Vol 43 (3) ◽  
pp. 683-688 ◽  
Author(s):  
Robert Fudin
Keyword(s):  
Visual Field ◽  
Word Recognition ◽  
Opposite Direction ◽  
Left Visual Field ◽  
Cerebral Dominance ◽  
Cerebral Hemispheres ◽  
Right Visual Field ◽  
The Right

McKeever and Huling questioned procedures in experiments on lateral differences in the recognition of horizontally oriented multi-letter stimuli, tachistoscopically exposed bilaterally. They effected three major changes in this method and found superior scores for material in the right than left visual field, a result in the opposite direction of prior findings. Ideas from directional scanning and cerebral dominance accounts of lateral asymmetries suggest that McKeever and Huling's methodological innovations produced their result. Directional scanning notions indicate that horizontal targets impede measures of differences in processing skills of the cerebral hemispheres. These obstacles can be overcome by exposing vertically oriented targets.

Role of Visual Acuity in Tachistoscopic Recognition of Three-Letter Words

1974 ◽  
Vol 38 (3) ◽  
pp. 755-761 ◽  
Author(s):  
Frank Curcio ◽  
William Mackavey ◽  
Jeffrey Rosen
Keyword(s):  
Visual Acuity ◽  
Visual Field ◽  
Word Recognition ◽  
Right Visual Field ◽  
Gap Detection ◽  
Vertical Meridian ◽  
Line Target ◽  
Tachistoscopic Recognition ◽  
The Right

It has been suggested that a correlation between word recognition and visual acuity would constitute a confounding influence in word-recognition studies within a laterality paradigm. 20 Ss made binary judgments concerning the presence or absence of a spatial gap in a tachistoscopically presented line target positioned at .75°, 1.5°, 3.0°, and 6.0° in either visual field. Gap detection was superior in the right visual field ( p = .02) at the 6.0° position. Word recognition was determined for tachistoscopically presented three-letter words positioned along a 6.0° vertical meridian in either visual field. Visual acuity performance was not related to word recognition either for the group or for individual Ss. The data therefore do not encourage the view that normal variations in acuity significantly affect word recognition in laterality studies.

scholarly journals Lateralization of attention in adults with ADHD: Evidence of pseudoneglect

2020 ◽  
Vol 63 (1) ◽  
Author(s):  
Bartosz Helfer ◽  
Stefanos Maltezos ◽  
Elizabeth Liddle ◽  
Jonna Kuntsi ◽  
Philip Asherson
Keyword(s):  
Reaction Time ◽  
Visual Field ◽  
Reaction Times ◽  
Study Participant ◽  
Reaction Time Task ◽  
Right Visual Field ◽  
Time Variability ◽  
Incentive Condition ◽  
Reaction Time Variability ◽  
The Right

Abstract Background. We investigated whether adults with attention-deficit/hyperactivity disorder (ADHD) show pseudoneglect—preferential allocation of attention to the left visual field (LVF) and a resulting slowing of mean reaction times (MRTs) in the right visual field (RVF), characteristic of neurotypical (NT) individuals —and whether lateralization of attention is modulated by presentation speed and incentives. Method. Fast Task, a four-choice reaction-time task where stimuli were presented in LVF or RVF, was used to investigate differences in MRT and reaction time variability (RTV) in adults with ADHD (n = 43) and NT adults (n = 46) between a slow/no-incentive and fast/incentive condition. In the lateralization analyses, pseudoneglect was assessed based on MRT, which was calculated separately for the LVF and RVF for each condition and each study participant. Results. Adults with ADHD had overall slower MRT and increased RTV relative to NT. MRT and RTV improved under the fast/incentive condition. Both groups showed RVF-slowing with no between-group or between-conditions differences in RVF-slowing. Conclusion. Adults with ADHD exhibited pseudoneglect, a NT pattern of lateralization of attention, which was not attenuated by presentation speed and incentives.

On the Relation between Visual Spatial Attention and Visual Field Asymmetries

1992 ◽  
Vol 44 (3) ◽  
pp. 529-555 ◽  
Author(s):  
T. A Mondor ◽  
M.P. Bryden
Keyword(s):  
Visual Field ◽  
Visual Attention ◽  
Visual Fields ◽  
Stimulus Onset ◽  
Right Visual Field ◽  
Structural Factors ◽  
Letter Identification ◽  
Functional Capabilities ◽  
Visual Spatial ◽  
The Right

In the typical visual laterality experiment, words and letters are more rapidly and accurately identified in the right visual field than in the left. However, while such studies usually control fixation, the deployment of visual attention is rarely restricted. The present studies investigated the influence of visual attention on the visual field asymmetries normally observed in single-letter identification and lexical decision tasks. Attention was controlled using a peripheral cue that provided advance knowledge of the location of the forthcoming stimulus. The time period between the onset of the cue and the onset of the stimulus (Stimulus Onset Asynchrony—SOA) was varied, such that the time available for attention to focus upon the location was controlled. At short SO As a right visual field advantage for identifying single letters and for making lexical decisions was apparent. However, at longer SOAs letters and words presented in the two visual fields were identified equally well. It is concluded that visual field advantages arise from an interaction of attentional and structural factors and that the attentional component in visual field asymmetries must be controlled in order to approximate more closely a true assessment of the relative functional capabilities of the right and left cerebral hemispheres.

scholarly journals Chronic (Rasmussen’s) Encephalitis in an Adult

2003 ◽  
Vol 30 (3) ◽  
pp. 263-265 ◽  
Author(s):  
Richard Wennberg ◽  
Sukriti Nag ◽  
Mary-Pat McAndrews ◽  
Andres M. Lozano ◽  
Richard Farb ◽  
...  
Keyword(s):  
Visual Field ◽  
Right Visual Field ◽  
Loss Of Consciousness ◽  
Mild Head Injury ◽  
Partial Seizures ◽  
Complex Partial Seizures ◽  
The Past ◽  
Rasmussen’S Encephalitis ◽  
The Face ◽  
The Right

A 24-year-old woman was referred because of incompletely-controlled complex partial seizures. Her seizures had started at age 21, after a mild head injury with brief loss of consciousness incurred in a biking accident, and were characterized by a sensation of bright flashing lights in the right visual field, followed by numbness and tingling in the right foot, spreading up the leg and to the arm, ultimately involving the entire right side, including the face. Occasionally they spread further to involve right facial twitching with jerking of the right arm and leg, loss of awareness and, at the onset of her epilepsy, rare secondarily generalized convulsions. Seizure frequency averaged three to four per month. She was initially treated with phenytoin and clobazam and subsequently changed to carbamazepine 800 milligrams per day. She also complained that her right side was no longer as strong as her left and that it was also numb, especially the leg, but felt that this weakness had stabilized or improved slightly over the past two years.

Lateral Onset Asynchrony in Left-Handers

1976 ◽  
Vol 43 (1) ◽  
pp. 255-259 ◽  
Author(s):  
Takeshi Hatta
Keyword(s):  
Visual Field ◽  
Standard Stimulus ◽  
The Other ◽  
Right Visual Field ◽  
Left Handed ◽  
The Right ◽  
Onset Asynchrony

Study of matching judgment was designed to demonstrate an effect of lateral onset asynchrony in left-handed subjects, 7 males and 8 females. Japanese Hirakana letters or random forms were presented to one visual field first and to the other visual field second. 15 left-handers were requested to judge whether the successively presented stimuli were “same” or “different.” The results showed that for both types of stimuli there are no differences in accuracy of matching judgment whether the standard stimulus was presented to the right visual field first or to the left. These results indicate that the left-handed subjects may have a tendency toward hemispheric equi-potentiality for recognition of both verbal and non-verbal materials.

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