Abstract

This chapter introduces the importance of understanding, measuring and using individual differences in the study of usability and interaction design. It discusses relevant individual differences that are cognitive, cultural, social and experiential. Suggested measures are given for the specific individual differences discussed, but the process of using valid and reliable measures of individual differences generalizes to all potential individual differences in usability. The chapter closes with practical advice for when to consider individual differences in the design process, adapted from Szalma’s model (2009). The chapter should enable the reader to know what individual differences are, how they are typically measured, how to know they might be applicable to any particular design question and when to consider them during the design process.