Comparative Study of Tachistoscopic Perception of Binary Figures in Deaf Children and Normally Hearing Children

1971 ◽  
Vol 33 (1) ◽  
pp. 195-200 ◽  
Author(s):  
Evans Mandes ◽  
Patricia Randle Allen ◽  
Charles W. Swisher
Keyword(s):  
Visual Perception ◽  
Comparative Study ◽  
Visual Stimuli ◽  
Deaf Children ◽  
Perceptual Development ◽  
Perception Task ◽  
Response Card ◽  
The Right ◽  
Hearing Children

An experiment was conducted to compare deaf children and normally hearing children on a visual perception task. The visual stimuli were 32 cards, each with a binary pattern of eight circles arranged horizontally or vertically. One circle on the right or top and one circle on the left or bottom of each card were blackened to form the binary patterns, one on each side of fixation. The stimuli were presented tachistoscopically at 1/10 sec. and 1/25 sec. S responded by pointing to the positions he saw blackened on a response card to depict 8 blank circles. It was found that deaf children did as well as normally hearing children and that both groups made fewer errors on the left and top positions of the stimulus dimensions. The data are interpreted as supporting a mediational approach in perceptual development among deaf children.

Deaf and Hearing Children’s Use of Language Describing Temporal Order among Events

1975 ◽  
Vol 18 (1) ◽  
pp. 58-73 ◽  
Author(s):  
Robert J. Jarvella ◽  
Jay Lubinsky
Keyword(s):  
Temporal Order ◽  
Deaf Children ◽  
Left Hand ◽  
Linguistic Performance ◽  
Right Hand ◽  
The Right ◽  
Hearing Children ◽  
Simple Sentences ◽  
Right Order

Six experiments are described in which deaf and hearing subjects decided the temporal order of events in picture series and in sentences. The deaf subjects, eight and 11 years old, performed as well as hearing children on a nonverbal picture sedation task. Both deaf and hearing subjects also described most picture series in the natural left-to-right order in which they were shown, and identified the left-hand picture in most series as happening first and the right-hand picture as happening last. In most respects, the deaf children’s linguistic performance resembled that of much younger hearing children. Two major results were that deaf children generally used a sequence of simple sentences to describe the events shown in a picture series, and responded to most multiple-clause sentences presented as though the events being described had occurred in the order they were mentioned.

scholarly journals Social Skills in Children and Adolescents: Differences Between Deaf and Hearing

2020 ◽  
Vol 30 ◽  
Author(s):  
Rafaela Fava de Quevedo ◽  
Ilana Andretta
Keyword(s):  
Social Skills ◽  
Comparative Study ◽  
Children And Adolescents ◽  
Social Performance ◽  
Developmental Differences ◽  
Deaf Children ◽  
Cross Sectional ◽  
The Social ◽  
Hearing Children

Abstract Deafness results in difficulties in identifying elements of social performance in other people. This study evaluated the social skills of deaf and hearing children and adolescents to draw a profile on the categories of social skills. This is a quantitative, cross-sectional, comparative study. The participants were 122 deaf and hearing children and adolescents, each group containing 61 individuals aged between 7 and 16 years. The instruments used were a sociodemographic questionnaire and the Teste de Habilidades Sociais para Crianças e Adolescentes em Situação Escolar (THAS-C). The results showed deficits in the social skills of deaf children and adolescents compared to hearing. The social skills profiles generally favored the hearing groups, with the exception of the item Conversation and Social Resourcefulness, which favored deaf children. Communicational and developmental differences were considered during the discussion. We stress the need for research with deaf individuals to propose interventions adapted to this population.

Neuropsychological studies of object recognition

1982 ◽  
Vol 298 (1089) ◽  
pp. 15-33 ◽  
Keyword(s):  
Object Recognition ◽  
Visual Perception ◽  
Visual Impairment ◽  
Right Hemisphere ◽  
Visual Stimuli ◽  
Perceptual Categorization ◽  
Tentative Model ◽  
The Right ◽  
Ground Organization

It is well established that disorders of visual perception are associated with lesions in the right hemisphere. Performances on tasks as disparate as the identification of objects from unusual views or objects drawn so as to overlap, of fragmented letters, of familiar faces, and of anomalous features in drawings, have been shown to be impaired in patients with focal right posterior lesions. A series of investigations are reviewed, directed towards analysing the basis of these deficits. Explanations in terms of primary visual impairment can be rejected, as can an account in terms of faulty figure-ground organization. It is argued that a wide variety of such perceptual deficits - all of which are concerned with meaningful visual stimuli - can be encompassed by the notion of faulty perceptual categorization at an early post-sensory stage of object recognition. Moreover, there is evidence suggesting that some of these various perceptual deficits can be mutually dissociated. The concept of perceptual categorization is discussed in the wider context of a tentative model of object recognition.

Speed of Visual Perception in Deaf Children

1969 ◽  
Vol 12 (1) ◽  
pp. 118-125 ◽  
Author(s):  
Donald G. Doehring ◽  
Joseph Rosenstein
Keyword(s):  
Visual Perception ◽  
Deaf Children ◽  
Perceptual Speed ◽  
Older Children ◽  
Speed Test ◽  
Reading Vocabulary ◽  
Task Requirements ◽  
Verbal Content ◽  
And Performance ◽  
Hearing Children

A test of visual perceptual speed was administered to 50 deaf and 50 hearing children equated in age, sex, and Performance IQ. The test included 13 subtests varying in stimulus complexity and verbal content. In each subtest the subject was required to identify and underline the correct stimulus, which was interspersed among similar stimuli, as rapidly as possible. The hearing children scored significantly higher on 9 of the 13 subtests; older children scored significantly higher on all subtests; and there was a significant interaction between age and hearing status on only one subtest. Correlations between subtest scores, reading vocabulary, and Performance IQ were also calculated. The results were discussed in terms of the specific task requirements of the visual perceptual speed test. It was concluded that deficits of visual perception in deaf children should be interpreted in relation to age, education, language development, and reading achievement of the populations studied.

Psychosocial Development of Hard-of-Hearing Preschool Children

2018 ◽  
Author(s):  
Nina Jakhelln Laugen
Keyword(s):  
Early Intervention ◽  
Psychosocial Development ◽  
Hard Of Hearing ◽  
Current Knowledge ◽  
Deaf Child ◽  
Deaf Children ◽  
Child Research ◽  
Universal Newborn Hearing Screening ◽  
Newborn Hearing ◽  
Hearing Children

In some respects, hard-of-hearing children experience the same difficulties as deaf children, whereas other challenges might be easier or more difficult to handle for the hard-of-hearing child than it would be for the deaf child. Research has revealed great variability in the language, academic, and psychosocial outcomes of hard-of-hearing children. Universal newborn hearing screening enables early identification and intervention for this group, which traditionally has been diagnosed rather late; however, best practices regarding the scope and content of early intervention have not yet been sufficiently described for hard-of-hearing children. This chapter summarizes the current knowledge concerning psychosocial development in hard-of-hearing children. Risk and protective factors, and their implications for early intervention, are discussed with a special emphasis on preschoolers.

scholarly journals Optimal Installation Location of Escape Route Signs at T-Type Intersections

2021 ◽  
Vol 13 (14) ◽  
pp. 7903
Author(s):  
Young-Hoon Bae ◽  
Jong-Yeong Son ◽  
Ryun-Seok Oh ◽  
Hye-Kyoung Lee ◽  
Yoon-Ha Lee ◽  
...  
Keyword(s):  
Decision Making ◽  
University Students ◽  
Simon Effect ◽  
Visual Stimuli ◽  
Escape Route ◽  
Emergency Evacuations ◽  
The Right

This study analyzed the decision-making times (DMTs) of participants at T-type indoor intersections according to the horizontal/vertical installation locations and the arrow directions of escape route signs. A total of 120 university students participated in the study. We analyzed the DMTs and following rates (FRs) required for the participants to observe the visual stimuli of the signs installed in front of the T-type indoor intersections and then properly select a path according to the arrow direction of the signs. The results are as follows: (1) the participants exhibited shorter DMTs for the right arrow direction of the signs, (2) the Simon effect occurred when the horizontal installation location of the signs was more than 60 cm away from the center of the T-type indoor intersection on both sides, (3) the DMTs of participants increased when the vertical installation location of the signs was low. Finally, we proposed an optimal installation location of the signs to support the shortest DMTs at T-type indoor intersections. It is expected that the results of this study will provide a database of DMTs, based on the locations of the signs during emergency evacuations, and will be utilized to improve the installation guidelines and regulations of signs.

scholarly journals Causal modulation of right hemisphere fronto-parietal phase synchrony with Transcranial Magnetic Stimulation during a conscious visual detection task

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chloé Stengel ◽  
Marine Vernet ◽  
Julià L. Amengual ◽  
Antoni Valero-Cabré
Keyword(s):  
Transcranial Magnetic Stimulation ◽  
Visual Perception ◽  
Frequency Band ◽  
Magnetic Stimulation ◽  
Visual Detection ◽  
Detection Task ◽  
Oscillatory Activity ◽  
Top Down ◽  
The Right ◽  
High Beta

AbstractCorrelational evidence in non-human primates has reported increases of fronto-parietal high-beta (22–30 Hz) synchrony during the top-down allocation of visuo-spatial attention. But may inter-regional synchronization at this specific frequency band provide a causal mechanism by which top-down attentional processes facilitate conscious visual perception? To address this question, we analyzed electroencephalographic (EEG) signals from a group of healthy participants who performed a conscious visual detection task while we delivered brief (4 pulses) rhythmic (30 Hz) or random bursts of Transcranial Magnetic Stimulation (TMS) to the right Frontal Eye Field (FEF) prior to the onset of a lateralized target. We report increases of inter-regional synchronization in the high-beta band (25–35 Hz) between the electrode closest to the stimulated region (the right FEF) and right parietal EEG leads, and increases of local inter-trial coherence within the same frequency band over bilateral parietal EEG contacts, both driven by rhythmic but not random TMS patterns. Such increases were accompained by improvements of conscious visual sensitivity for left visual targets in the rhythmic but not the random TMS condition. These outcomes suggest that high-beta inter-regional synchrony can be modulated non-invasively and that high-beta oscillatory activity across the right dorsal fronto-parietal network may contribute to the facilitation of conscious visual perception. Our work supports future applications of non-invasive brain stimulation to restore impaired visually-guided behaviors by operating on top-down attentional modulatory mechanisms.

Some Factors Affecting Reaction Times to Auditory Stimuli in Mental Patients

1954 ◽  
Vol 100 (419) ◽  
pp. 462-477 ◽  
Author(s):  
K. R. L. Hall ◽  
E. Stride
Keyword(s):  
Reaction Time ◽  
Visual Perception ◽  
Visual Stimuli ◽  
Reaction Times ◽  
Auditory Stimuli ◽  
Factors Affecting ◽  
Mental Patients ◽  
Personal Equation ◽  
Work Up

A number of studies on reaction time (R.T.) latency to visual and auditory stimuli in psychotic patients has been reported since the first investigations on the personal equation were carried out. The general trends from the work up to 1943 are well summarized by Hunt (1944), while Granger's (1953) review of “Personality and visual perception” contains a summary of the studies on R.T. to visual stimuli.

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