Punching psychological and sociological data on Hollerith cards

Abstract

The use of secondary data sheets is not necessary; Hollerith cards may be punched directly from raw data sheets after a reasonably short practice period. The processes of punching and verifying Hollerith cards may best be done entirely separately; immediate knowledge of errors appreciably lowers the efficiency of the punch operator. (PsycInfo Database Record (c) 2025 APA, all rights reserved)