The review rate before and after the maximum value gives us an indication of the influence of mass media versus the
socially mediated word of mouth, which both can result in peaks of reviews. I.e., emotions can grow in the Internet
community without external input, as seen in the second example of fig. 4. The book “Marley and Me” was not subject
of any important marketing or mass media campaign, but its readers spread information about the book through word of
mouth and positive reviews. The increase to the peak is softer than in the case of the media-induced emotions, but also its
decay is slower. This is a good example of emergent collective emotion created within the cyberspace, without much input
from traditional media.