The effect on performance of tilting the toll-operator's keyset

Abstract

The long-distance operator's keyset is a ten-button set with the numbers and letters arranged in two columns of five, and a third column containing two control keys. To investigate the relationship of keying performance and keyset inclination, 8 male and 8 female Ss each keyed 10-digit numbers under 8 inclination angles, from 0 to 40 degrees relative to the working surface. Eight by eight Latin squares were used with the variables subjects, days, and angular inclination. "1. Keying accuracy and… time are independent of the inclination… . 2. Both accuracy and speed increased significantly through-out the… test. 3. The greatest source of variation… is… between subjects." (PsycInfo Database Record (c) 2025 APA, all rights reserved)