Reversal of Asymmetry in Human Perceptual Performance as a Function of Labeling, Mode of Response, and Familiarity

It has previously been demonstrated that certain characteristics of the stimulus, specifically visual complexity and verbal association value, as well as mnemonic factors are important in producing the usually obtained asymmetry in human perceptual performance, and thus presumably, hemispheric asymmetry of function. The present research demonstrated that the usual superiority of the left visual field for high-complexity, low-association-value visual forms can be reversed by the acquisition and use of verbal labels for such stimuli but is only attenuated when the labels are not used to respond to the stimuli. Simple familiarity with the visual stimuli attenuated the difference between the fields, but here there was no reversal. Implications of these results for hemispheric processing are discussed.

Download Full-text

Some Factors in the Recognition of Tachistoscopically Presented Alphabetical Arrays

Perceptual and Motor Skills ◽

10.2466/pms.1972.35.3.951 ◽

1972 ◽

Vol 35 (3) ◽

pp. 951-959 ◽

Cited By ~ 8

Author(s):

Robert Fudin ◽

John T. Kenny

Keyword(s):

Visual Field ◽

Left Visual Field ◽

Retinal Location ◽

Right Visual Field ◽

Central Fixation Point ◽

Information Delay ◽

The Difference ◽

The Right ◽

The Relationship ◽

Central Fixation

Six-letter nonsense arrays, constructed from a 12-letter population which was not made known to 20 Ss, were tachistoscopically shown successively in the right visual field (RVF) and left visual field (LVF) at three displacements from a central fixation point. Recognition scores were higher for stimuli in the RVF at each displacement. In each case RVF superiority was limited to letters in the first array-half (letters 1, 2, 3). These results agree with prior findings obtained with targets made up of six letters known to S (Fudin, 1969). Reportability of a tachistoscopically exposed letter, in part, is a function of the relationship between its retinal location and the delay before it is scanned. Location determines the amount of information a letter contains before it starts to fade-out (the more acute the area, the greater the information), delay determines the period of information dissipation prior to scanning. These ideas were used to explain the contrast between high error scores for middle-array letters in the bow-shaped error curves found in this experiment and the low values often reported for these letters when targets are shown across fixation, and the finding that the difference between error scores for letters in the first and second array-halves was greater for targets at each displacement in the right than the left visual field.

Download Full-text

Perception of Geometrical Arrays Tachistoscopically Exposed in Right and Left Visual Fields

Perceptual and Motor Skills ◽

10.2466/pms.1975.40.3.831 ◽

1975 ◽

Vol 40 (3) ◽

pp. 831-834 ◽

Cited By ~ 2

Author(s):

Robert Fudin ◽

Darryl B. Feldman

Keyword(s):

Visual Field ◽

Left Visual Field ◽

Visual Fields ◽

Physiological Mechanism ◽

Right Visual Field ◽

Extensive Experience ◽

The Difference ◽

The One ◽

The Right ◽

Left Movement

Geometrical stimuli (48 6-item arrays of familiar forms, e.g., circle), tachistoscopically presented in the right or left visual field, were more accurately perceived in the right than left visual field by 15 college students. Targets about half the length of the displays exposed here were perceived with equal facility in both visual fields (Bryden, 1960). Results suggest that length of array might affect the difference in perceptual accuracy of forms shown in the right and left visual fields. Figures in the right visual field were predominantly processed from left to right, and forms in the left visual field from right to left. Since more symbols were identified in the right than left visual field, the left to right encoding sequence may be more efficient than a right to left movement. Limited experience of most Ss in reading symbols from left to right is probably only one factor. Extensive experience reading alphabetical material from left to right might have developed the physiological mechanism underpinning this sequence more than the one serving the opposite movement.

Download Full-text

Hemispheric Asymmetry in Reaction Time to Color Stimuli

Perceptual and Motor Skills ◽

10.2466/pms.1977.45.3f.1151 ◽

1977 ◽

Vol 45 (3_suppl) ◽

pp. 1151-1155 ◽

Cited By ~ 11

Author(s):

M. Pirot ◽

T. W. Pulton ◽

L. W. Sutker

Keyword(s):

Reaction Time ◽

Visual Field ◽

Left Visual Field ◽

Hemispheric Asymmetry ◽

Visual Fields ◽

Left Hand ◽

Simple Detection ◽

Color Field ◽

The Right ◽

Male Subjects

The simple detection of colored stimuli in the right, center, and left visual fields was examined. 10 male subjects were used in a reaction time paradigm with color (red, green, or blue), field, and hand as independent variables. A significantly faster RT to stimuli presented in the left visual field was observed, and further the left visual field-left hand combination was the fastest of all the combinations of visual-field × hand. A significant interaction of color × field suggested that red may be processed on a higher order level even in a simple detection task.

Download Full-text

Sex-Related Differences in Hemispheric Asymmetries in Processing Simple Geometrical Figures

Perceptual and Motor Skills ◽

10.2466/pms.1980.51.1.223 ◽

1980 ◽

Vol 51 (1) ◽

pp. 223-229 ◽

Cited By ~ 3

Author(s):

Sebastiano Bagnara ◽

Francesca Simion ◽

Sergio Roncato ◽

Carlo Umiltà

Keyword(s):

Visual Field ◽

Left Visual Field ◽

Hemispheric Asymmetry ◽

Hemispheric Asymmetries ◽

Physical Identity ◽

Women Subjects ◽

Clear Cut ◽

Processing Strategies ◽

Male Subjects ◽

Level Of Processing

16 (8 men, 8 women) subjects were required to respond same or different to pairs of geometrical figures. Same responses were given to physical identity pairs, to analog identity pairs, and to name identity pairs. Male subjects showed a left visual-field advantage regardless of the level of processing, whereas female subjects did not show a clear-cut hemispheric asymmetry. These results were discussed in terms of different processing strategies employed by the two sexes.

Download Full-text

Sex Differences in Hemispheric Asymmetry Revisited

Perceptual and Motor Skills ◽

10.2466/pms.1978.47.1.315 ◽

1978 ◽

Vol 47 (1) ◽

pp. 315-321 ◽

Cited By ~ 50

Author(s):

H. Julia Hannay ◽

Catherine L. Boyer

Keyword(s):

Sex Differences ◽

Visual Field ◽

Left Hemisphere ◽

Left Visual Field ◽

Hemispheric Asymmetry ◽

Right Visual Field ◽

Males And Females ◽

The Right ◽

Significant Superiority

56 male and 56 female familial right-handers were given a tachistoscopic task requiring recognition of trigrams presented binocularly and vertically in the right or left visual field fot individually determined brief durations. Both males and females obtained a significant superiority in the right visual field and significant laterality coefficients indicative of processing by the left hemisphere. Implications for research on sex differences in hemispheric asymmetry are discussed.

Download Full-text

Visual Field Test With Gaze Check Tasks: Application in a Homonymous Hemianopic Patient Unaware of the Visual Defects

Frontiers in Neurology ◽

10.3389/fneur.2021.682761 ◽

2021 ◽

Vol 12 ◽

Author(s):

Katsuei Shibuki ◽

Tsuyoshi Yokota ◽

Akane Hirasawa ◽

Daisuke Tamura ◽

Shin Hasegawa ◽

...

Keyword(s):

Visual Field ◽

Field Test ◽

Visual Information ◽

Left Visual Field ◽

Visual Stimuli ◽

Small Object ◽

Gaze Control ◽

The Gaze ◽

Visual Field Test ◽

Visual Defects

Gaze control is required for applying visual stimuli to a particular area of the visual field. We developed a visual field test with gaze check tasks to investigate hemianopia. In this test, participants must report the presence or absence of visual stimuli when a small object at the fixation point vibrates. Trials in the absence of visual stimuli were used as gaze check tasks, since the vibration could be observed only when the gaze was directed at the fixation point. We evaluated the efficacy of our test in four control participants and one patient with homonymous hemianopia who was unaware of the defects in the left visual field. This patient presented hemianopia in the test with gaze check tasks, but not when the gaze check tasks were omitted. The patient showed spontaneous gaze movements from the fixation point to the upper left direction, as well as scanning of the left visual field during the test without gaze check tasks. Thus, we concluded that the visual defects in this patient were compensated in daily life by spontaneous eye movements coordinated with visual information processing. The present results show the usefulness of the visual field test with gaze check tasks.

Download Full-text

Left visual field advantage for object recognition during rapid serial presentation

PsycEXTRA Dataset ◽

10.1037/e536982012-667 ◽

1997 ◽

Author(s):

Barbara J. Knowlton ◽

Sean P. McAullffe

Keyword(s):

Object Recognition ◽

Visual Field ◽

Left Visual Field

Download Full-text

Faculty Opinions recommendation of Fighting from the right side of the brain: left visual field preference during aggression in free-ranging male tree lizards (Urosaurus ornatus).

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1007881.99358 ◽

2002 ◽

Author(s):

Peter F MacNeilage

Keyword(s):

Visual Field ◽

Left Visual Field ◽

Urosaurus Ornatus ◽

Male Tree ◽

Tree Lizards ◽

The Right ◽

Free Ranging ◽

The Brain

Download Full-text

An Integrated Perspective on Spatio-Temporal Attention and Infant Language Acquisition

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18041592 ◽

2021 ◽

Vol 18 (4) ◽

pp. 1592

Author(s):

Sofia Russo ◽

Giulia Calignano ◽

Marco Dispaldro ◽

Eloisa Valenza

Keyword(s):

Visual Field ◽

Speech Signal ◽

Discrimination Task ◽

Language Skills ◽

Visual Stimuli ◽

Temporal Attention ◽

Early Language ◽

Attentional Processes ◽

Spatio Temporal ◽

Infant Language

Efficiency in the early ability to switch attention toward competing visual stimuli (spatial attention) may be linked to future ability to detect rapid acoustic changes in linguistic stimuli (temporal attention). To test this hypothesis, we compared individual performances in the same cohort of Italian-learning infants in two separate tasks: (i) an overlap task, measuring disengagement efficiency for visual stimuli at 4 months (Experiment 1), and (ii) an auditory discrimination task for trochaic syllabic sequences at 7 months (Experiment 2). Our results indicate that an infant’s efficiency in processing competing information in the visual field (i.e., visuospatial attention; Exp. 1) correlates with the subsequent ability to orient temporal attention toward relevant acoustic changes in the speech signal (i.e., temporal attention; Exp. 2). These results point out the involvement of domain-general attentional processes (not specific to language or the sensorial domain) playing a pivotal role in the development of early language skills in infancy.

Download Full-text