Information Search Process Model
The Information Search Process (ISP) model, developed by Carol Kuhlthau and consolidated in her 1991 study 'Inside the Search Process,' describes information seeking as a holistic, extended experience in which feelings, thoughts and actions evolve together across six stages. Drawing on a series of longitudinal studies of students working on research papers, Kuhlthau showed that an information search is not a smooth, rational march to an answer but an emotional journey: uncertainty and anxiety are highest in the early, exploratory phase and only subside once the seeker forms a personal focus for the work. Her 'uncertainty principle' reframed information seeking as a process of construction in the sense of George Kelly's personal construct theory, and her notion of a 'zone of intervention' gave librarians and system designers a principled account of when and how to help.
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