 This also means that perception of aesthetic form is not a matter of unrelated singular perceptions, but it is “serial”, in that “each sequential act builds up and reinforces what went before” (AE: 136). According to Dewey, aesthetic form possess “qualitative unity” which can be immediately felt. A fuller aesthetic experience, nevertheless, requires engaging with the form’s organization precisely in the sense of serial perception. (AE: 141) Against this background, Dewey calls into question the traditional distinction between the arts of time (music, theater, dance) and the arts of space (painting, sculpture, architecture). Even the spatial arts include important temporal dimensions and have to be “perceived by accumulative series of interactions” (AE: 223). Through this sort of serial and cumulating engagement the aesthetic object gradually builds up for the experiencer. This, according to Dewey, is especially the case with the supposedly static art of architecture: