The document discusses the relationship between psychology and user experience design (UXD). It notes that psychology now informs UXD through areas like persuasive design, social interfaces, and changing user behaviors. The user is viewed as both a psychological and social system, as digital interactions extend cognitive processes and social dynamics. For enterprise contexts, UXD can focus on enabling sociality to encourage collaboration and knowledge sharing. The document argues that UXD needs to more deeply integrate perspectives from fields like social psychology to design richer psychological and social experiences for complex users.