Full Idea
Nowadays phenomenalism is held to be a theory of perception which says that physical objects are logical constructions out of sense-data.
Gist of Idea
Modern phenomenalism holds that objects are logical constructions out of sense-data
Source
A.J. Ayer (Phenomenalism [1947], §1)
Book Reference
Ayer,A.J.: 'Philosophical Essays' [Macmillan 1965], p.125