Sensationalism
"Sensationalism," the doctrine that all knowledge is derived from sensations, takes several closely related forms. As a psychological theory it stresses the origins of knowledge and the processes by which it is acquired; it seeks to reduce all mental contents to unitary sensations and has close connections with associationism. It is sometimes, as by its acute but sympathetic critic James Ward, called presentationism. As an epistemological theory it tends toward the view that statements purporting to describe the world are analyzable into statements concerning the relations between sensations and that this analysis elucidates the meanings of the original statements. It is sometimes regarded as a form of empiricism and adopted with antimetaphysical intentions.
Sensations are usually regarded as occurrences in us, either caused by external objects (Epicurus and John Locke) or not meaningfully attributable to external causes (James Mill and Étienne Bonnot de Condillac). By some they are explicitly likened to feelings or emotions (Anaxagoras and David Hartley), and by others to images (Ernst Mach); the more modern forms, however, probably depend, even if not explicitly, on taking them all as analogous to feelings.
There is a tendency to associate sensationalism with the nineteenth and twentieth centuries, as a development of the work of the empiricists of the seventeenth and eighteenth centuries, but it actually has a long history.
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