Delphi Method

A structured research technique originally developed by the RAND Corporation for forecasting, in which a panel of experts participates in multiple rounds of questioning to reach consensus on a topic. In accessibility and HCI research, the Delphi method is used to gather expert opinions on design requirements, technology barriers, or user needs through iterative interviews or questionnaires where panellists can refine their views based on aggregated group feedback. The method is particularly valuable for exploring complex, subjective topics such as technology adoption barriers or accessibility priorities, where quantitative data alone may not capture the deeper-seated attitudes and motivations of users.