Search the definition of the word colifichet, follow the advice of a gardener to treat a sick plant, perceive the sweet scent of a crème brûlée, learn about the acquisition of a new home, all these activities, while radically distinct, have similarities for researchers in the study of information behavior (Information Behavior). Donald O. Case, in his book Looking for Information: A Survey of Research and Information Seeking, Needs and Behavior, collects all the disciplinary content related to this branch of the information sciences.