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Norrie disease

a type of congenital blindness that is inherited in an X-linked recessive pattern or, rarely, is caused by a spontaneous genetic mutation and almost always affects males. Progressive hearing loss is seen in about one third of cases, and more than half of affected individuals experience developmental delays in motor skills such as sitting up and walking. Additional problems associated with this disease are mild to moderate intellectual disability; psychosis; and abnormalities that interfere with breathing, circulation, excretion, or reproduction. [reported in 1927 by Gordon Norrie (1855–1941), Danish ophthalmologist]

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Psychology term of the day

January 11th 2025

test marketing

test marketing

research undertaken to assess consumer reactions to new or altered products. Companies often try to carry out this research discreetly so that competitors are unaware of any potential changes. On the basis of the results, products may be introduced into the general market, introduced after changes, or withdrawn.