Occupational differences in color blindness

Abstract

The Ishihara test for color blindness yields the following percentages of defect for various occupational groups tested at the Cincinnati employment center: union painters 3.88, non-union painters 8.03, total painters 6.7, truck drivers 6.7, and chauffeurs 6.0. A table is presented showing figures on general populations and on salesmen by other investigators. (PsycInfo Database Record (c) 2025 APA, all rights reserved)