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Direct linkThompson, Stacy D.; Merino, Sarah – Young Exceptional Children, 2018
Visual Impairments (VIs) are ranked as the fourth most common disability in the United States and are viewed as the most common restricting condition during childhood. It has been reported that 17% to 25% of school-aged children have some degree of a vision problem, thus interrupting their potential to reach optimal growth and learning in school.…
Descriptors: Visual Impairments, Early Intervention, Visual Acuity, Vision
Sauer, Theodor; Lawrence, Linda; Mayo-Ortega, Liliana; Oyama-Ganiko, Rosa; Schroeder, Stephen – Journal of Mental Health Research in Intellectual Disabilities, 2018
The prevalence of refractive error and ocular disorders among infants and young children with severe behavioral problems and developmental disorders is not well defined, particularly in developing countries. We performed a retrospective review of ophthalmic examinations performed during a National Institutes of Health--funded cohort study of very…
Descriptors: Infants, Young Children, Behavior Disorders, Developmental Disabilities
Libertus, Klaus; Needham, Amy – International Journal of Behavioral Development, 2014
Infants' preference for faces was investigated in a cross-sectional sample of 75 children, aged 3 to 11 months, and 23 adults. A visual preference paradigm was used where pairs of faces and toys were presented side-by-side while eye gaze was recorded. In addition, motor activity was assessed via parent report and the relation between motor…
Descriptors: Infants, Preferences, Human Body, Eye Movements
Bertenthal, Bennett I.; Gredeback, Gustaf; Boyer, Ty W. – Child Development, 2013
Sixty infants divided evenly between 5 and 7 months of age were tested for their knowledge of object continuity versus discontinuity with a predictive tracking task. The stimulus event consisted of a moving ball that was briefly occluded for 20 trials. Both age groups predictively tracked the ball when it disappeared and reappeared via occlusion,…
Descriptors: Infants, Cognitive Development, Eye Movements, Prediction
Odic, Darko; Libertus, Melissa E.; Feigenson, Lisa; Halberda, Justin – Developmental Psychology, 2013
From very early in life, humans can approximate the number and surface area of objects in a scene. The ability to discriminate between 2 approximate quantities, whether number or area, critically depends on the ratio between the quantities, with the most difficult ratio that a participant can reliably discriminate known as the Weber fraction.…
Descriptors: Young Children, Age, Adults, Age Groups
Feigenson, Lisa – Journal of Experimental Child Psychology, 2011
Although the psychophysics of infants' nonsymbolic number representations have been well studied, less is known about other characteristics of the approximate number system (ANS) in young children. Here three experiments explored the extent to which the ANS yields abstract representations by testing infants' ability to transfer approximate number…
Descriptors: Number Systems, Infants, Young Children, Experiments
Yu, Chen; Yurovsky, Daniel; Xu, Tian – Infancy, 2012
Infant eye movements are an important behavioral resource to understand early human development and learning. But the complexity and amount of gaze data recorded from state-of-the-art eye-tracking systems also pose a challenge: how does one make sense of such dense data? Toward this goal, this article describes an interactive approach based on…
Descriptors: Infants, Eye Movements, Visual Aids, Data Analysis
Phenotypical Characteristics of Idiopathic Infantile Nystagmus with and without Mutations in "FRMD7"
Thomas, Shery; Proudlock, Frank A.; Sarvananthan, Nagini; Roberts, Eryl O.; Awan, Musarat; McLean, Rebecca; Surendran, Mylvaganam; Kumar, A. S. Anil; Farooq, Shegufta J.; Degg, Chris; Gale, Richard P.; Reinecke, Robert D.; Woodruff, Geoffrey; Langmann, Andrea; Lindner, Susanne; Jain, Sunila; Tarpey, Patrick; Raymond, F. Lucy; Gottlob, Irene – Brain, 2008
Idiopathic infantile nystagmus (IIN) consists of involuntary oscillations of the eyes. The familial form is most commonly X-linked. We recently found mutations in a novel gene "FRMD7" (Xq26.2), which provided an opportunity to investigate a genetically defined and homogeneous group of patients with nystagmus. We compared clinical features and eye…
Descriptors: Visual Impairments, Eye Movements, Visual Acuity, Depth Perception
Peer reviewedAdams, Russell J.; And Others – Journal of Experimental Child Psychology, 1986
Two experiments assessed the extent of newborns' ability to discriminate color. Results imply that newborns have some, albeit limited, capacity to discriminate chromatic from achromatic stimuli, and hence, are at least dichromats. (Author/DR)
Descriptors: Infants, Neonates, Vision Tests, Visual Acuity
Peer reviewedSalapatek, Philip; And Others – Child Development, 1976
Examined acuity thresholds for 1- and 2-month-old infants by presenting square wave gratings in a preference paradigm at four viewing distances. (Author/JMB)
Descriptors: Distance, Infants, Visual Acuity, Visual Perception
Download full textSalapatek, Philip; And Others – 1975
This study investigated whether the acuity threshold for distant targets is elevated for infants ranging in age from 24 to 63 days. Using square wave gratings and a modified staircase procedure, acuity thresholds for each of 331 infants were determined for one or more of the distances 30 cm, 60 cm, 90 cm and 150 cm. Acuity threshold was defined as…
Descriptors: Distance, Eye Fixations, Infants, Physiology
Banks, Martin S.; Leitner, Edward F. – 1979
This paper reports the major findings and interprets the results of longitudinal and cross-sectional exPeriments concerning the development of visual accommodation in infants 1 to 3 months of age. The stimulus was a high-contrast, random checkerboard which was presented at three different distances from the infants (25, 50 or 100 cm). The physical…
Descriptors: Conference Reports, Eyes, Infants, Neonates
Gwiazda, Jane; And Others – Sight-Saving Review, 1979
Based on studies and clinical findings, two techniques for testing infant vision are described: near-retinoscopy (used to assess the refractive state of infants and young children) and a fast preferential looking procedure (used to assess the acuity of infants up to one year of age). (DLS)
Descriptors: Disability Identification, Infants, Screening Tests, Vision Tests
Robb, Richard M. – Sight Saving Rev, 1970
Descriptors: Child Development, Eyes, Identification, Infants
PDF pending restorationSpellman, Charles R.; And Others – 1982
The project was designed to develop an alternate testing method for the visual acuity assessment of preschool children with handicaps. Additional project objectives included evaluation and modification of existing experimental procedures for discrimination training and visual acuity testing of preschool handicapped children; establishment of a…
Descriptors: Infants, Preschool Education, Screening Tests, Test Construction
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