Add to ORKGThe study has shown that there is an appreciably greater frequency of defective color vision among the mentally retarded children in the counties specified than that found in normal children. The general objective of this study was to determine the frequency of color blindness among mentally retarded children in an area of northwest Iowa. The subjects were children in fifteen special education classes for the mentally retarded. The Hardy-Rand-Ritter Pseudoisochromatic plates for detecting, classifying, and estimating the degree of defective color vision were used in this study. The author in all cases did the examining
The investigation was undertaken to obtain data on the number of kindergarten, second, and seventh g...
Owing to the fact that color blindness is seemingly quite an intangible phenomenon and that there ar...
INTRODUCTION: Color vision defect can be observed in various diseases of optic nerve and retina and ...
The study has shown that there is an appreciably greater frequency of defective color vision among t...
During the past two years 2,163 students at Iowa State College were tested for colorblindness by mea...
Prevalence of color vision deficiencies, as identified on examination with plates from the Ishihara ...
In nearly every classroom sits at least one student who is unable to distinguish between certain col...
Owing to their intellectual handicap, it is of utmost importance that visual deficiencies of retarde...
Color vision deficiency is a condition affecting human's ability to see or recognize specific colors...
Color blindness or color vision deficiency is X-linked recessive disorder that affects males more fr...
Citation: Sperry, Mabelle and Nellie Dorothy Hughes. Inquiry into the mental development of children...
Color blindness or color vision deficiency is X-linked recessive disorder that affects males more fr...
Background and aims: Color blindness is a disease that remains undiagnosed in some cases. The diagn...
Color blindness is the condition where there has been a change to the cone receptors of the eye. The...
Because of the increasing use of color in instructional materials at the level of the primary grades...
The investigation was undertaken to obtain data on the number of kindergarten, second, and seventh g...
Owing to the fact that color blindness is seemingly quite an intangible phenomenon and that there ar...
INTRODUCTION: Color vision defect can be observed in various diseases of optic nerve and retina and ...
The study has shown that there is an appreciably greater frequency of defective color vision among t...
During the past two years 2,163 students at Iowa State College were tested for colorblindness by mea...
Prevalence of color vision deficiencies, as identified on examination with plates from the Ishihara ...
In nearly every classroom sits at least one student who is unable to distinguish between certain col...
Owing to their intellectual handicap, it is of utmost importance that visual deficiencies of retarde...
Color vision deficiency is a condition affecting human's ability to see or recognize specific colors...
Color blindness or color vision deficiency is X-linked recessive disorder that affects males more fr...
Citation: Sperry, Mabelle and Nellie Dorothy Hughes. Inquiry into the mental development of children...
Color blindness or color vision deficiency is X-linked recessive disorder that affects males more fr...
Background and aims: Color blindness is a disease that remains undiagnosed in some cases. The diagn...
Color blindness is the condition where there has been a change to the cone receptors of the eye. The...
Because of the increasing use of color in instructional materials at the level of the primary grades...
The investigation was undertaken to obtain data on the number of kindergarten, second, and seventh g...
Owing to the fact that color blindness is seemingly quite an intangible phenomenon and that there ar...
INTRODUCTION: Color vision defect can be observed in various diseases of optic nerve and retina and ...