Cultural probes are research kits given to participants so they can document their own experiences, environments, and emotions over time. Originally developed by Bill Gaver and his colleagues at the Royal College of Art in the late 1990s, probes were designed to gather fragmentary, subjective glimpses of daily life rather than objective data. They are particularly well-suited to research on intimate topics, domestic environments, and vulnerable populations where a researcher's direct presence would be intrusive or distorting.