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People often times fail to detect changes in scenes they observe. We examined theme, whether an object was related to a scene or not, as well as object change, whether the object was added or deleted to the previous scene, would effect the reaction time in identifying a change. Participants were randomly assigned to one of two object change conditions (add or delete) and then were asked to judge whether or not there was a change involving scenes with related objects changing, as well as scenes with unrelated objects changing. The results showed a main effect of theme but no main effect of object change as well as no interaction between the two independent variables.