 Quarantining gives way to contagion when imagined content ends up playing a direct role in actual attitudes and behavior (see also Gendler 2008a, 2008b). This is common in cases of affective transmission, where an emotional response generated by an imagined situation may constrain subsequent behavior. For example, imagining something fearful (such as a tiger in the kitchen) may give rise to actual hesitation (such as reluctance to enter the room). And it also occurs in cases of cognitive transmission, where imagined content is thereby “primed” and rendered more accessible in ways that go on to shape subsequent perception and experience. For example, imagining some object (such as a sheep) may make one more likely to “perceive” such objects in one’s environment (such as mistaking a rock for a ram).