What is it about?
This study is about visual acuity and visual recognition memory in 12 multi-handicapped, intellectually disabled participants diagnosed with deafblindness. Eight of the individuals scored above the threshold for legal blindness, and six exhibited varying levels of visual ability ranging from poor to nearly normal eyesight.
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Why is it important?
The participants were tested on two different occasions with Teller Acuity Cards. Eight individuals had results above the threshold for legal blindness, while six showed a range of visual abilities from poor to near normal vision. Three displayed evidence of perceptual recognition memory as assessed by the preferential looking paradigm.
Perspectives
Using Teller Acuity Cards with preferential looking can detect perceptual and cognitive abilities missed by standard clinical observation, highlighting the value of formal testing in assessments.
Professor Lars Smith
University of Oslo
Read the Original
This page is a summary of: Hidden visual capabilities in mentally retarded subjects diagnosed as deaf—blind, Vision Research, October 1997, Elsevier,
DOI: 10.1016/s0042-6989(97)00098-9.
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