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National Center on Deaf-Blindness, 2019
This report is the 33rd edition of the annual National Child Count of Children and Youth Who Are Deaf-Blind, the first and longest running registry and knowledge base of children who are deaf-blind in the world. Begun in 1986 on behalf of the U.S. Department of Education, it represents a collaborative effort between the National Center on…
Descriptors: Deaf Blind, Students with Disabilities, Student Needs, Children
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Miller, Paul; Mulvey, Charles; Martin, Nick – Economics of Education Review, 2001
Data from a large sample of Australian twins indicate that 50 to 65 percent of variance in educational attainments can be attributed to genetic endowments. Only about 25 to 40 percent may be due to environmental factors, depending on adjustments for measurement error and assortative mating. (Contains 51 references.) (MLH)
Descriptors: Educational Attainment, Elementary Secondary Education, Environmental Influences, Foreign Countries