“…Not only do images betray the mark of an active author, they also incur active engagement on the part of the viewers. Given the performative force of the image we are arguing for, it makes sense to draw on Austin's (1962) well-known notion of the 'speech-act', and to posit the role of an 'image-act' (see also Bakewell, 1998). Just as words do, images act on us by informing, ordering, warning, inspiring, persuading, or deterring.…”