SJWEH Supplements are open access, (mostly) non-peer-reviewed articles usually published in theme issues or as part of a series of papers from a conference or workshop. Scand J Work Environ Health stopped publishing SJWEH Supplements in 2009.


SJWEH Supplements 2007;(no 3):26-32    pdf

Children and gender—differences in exposure and how anthropometric differences can be incorporated into the design of computer input devices

by Johnson PW, Blackstone JM

Objectives This study attempted to determine whether the current “one-size-fits-all” paradigm used for computer input devices meets the needs of the current computer-using population.

Methods Wrist posture and muscle activity in the flexor digitorum superficialis and extensor digitorum communis muscles were measured and compared between 14 children (ages 5 to 8 years) and their same-gender biological parents. The participants performed a standardized mousing task with a standard and child-proportional mouse. The literature on finger anthropometry was systematically reviewed to determine finger size variation as a function of age, size percentile (5th, 50th, 95th), and gender and its influence on the design of computer input devices.

Results With the standard mouse, the children used a greater [18.4 (SD 11.3) degrees] ulnar deviation and less [9.4 (SD 12.9) degrees] extension than their adult counterparts. With the child-proportional devices, their ulnar deviation [4.0 (SD 6.4) degrees, P=0.04] was significantly reduced, as was their forearm muscle activity (P

This article refers to the following texts of the Journal: 2003;29(3):197-205  2000;26(5):390-397  2000;26(5):398-405