The Creative Problem-Solving Research Group (CPSRG) at Lancaster University is a collaboration between psychologists and computer scientists conducting research into creativity, problem-solving and design at the interface between humans and computer systems. Our aim is to develop theoretical understandings and practical interventions that address how creative individuals and groups manage conflicting demands of novelty and divergent thinking versus constraint, domain relevance and minimization of task load. Current projects include creative design in virtual and ubiquitous environments, developing methodologies for inspirational design, and impacts of expert reasoning on creative problem-solving.