For a screening test, 90% specificity means that 90% of non diseased persons will give a -

a 90% specificity means that 90%of the non diseased persons will give "true negative result",10% of non diseased people screened by the test will be wrongly classified as &;;diseased" when they are not. ref:park&;s textbook of preventive and social medicine,22nd edition,pg no 131