 Sense-datum and intentionalist views both see perceptual experience as a two-place relation between perceiver and inner representative. Adverbialism, on the other hand, holds that perceptual experience itself is monadic; it doesn't involve the perceiver standing in a relation to something  (see the entry on the    problem of perception).[1]  Different kinds of perceptual experiences are simply different ways of sensing: one “senses greenly” or “is appeared to horsely”, and such locutions do not commit us to the existence of either sense-data or representations. Adverbialism is sometimes offered as an ontologically neutral way of talking about experiences (Chisholm 1957), sometimes as the more contentious claim that perceptual experience is primitive and unanalyzable.