Women decide on about 80% of the goods that their household buys. But marketers often sell products, especially technical ones, that are designed by men and therefore are oriented largely toward their needs. Consequently, assembly instructions for these products are also oriented toward men’s needs. To illustrate the impact of gender orientation in assembly instructions, this study investigates whether theoretical cognitive or psychological gender differences have a practical influence on the usability of assembly instructions. This study has direct implications for technical writers who strive for a more universal design for such instructions.