previous research addressed change blindness and the role of human cognition, but not yet the influence of mood on change blindness. The levels-of-focus hypothesis and attentional flexibility research support the hypothesis that a positive mood increases performance for detecting peripheral changes in a change blindness task. Two studies revealed increased performance in a positive mood; the first showed better detection of central changes, whereas in the second study this was found for peripheral changes. Both studies revealed evidence for visual sensing. Although the hypothesis that a positive mood leads to a broader visual attention focus or higher visual attentional flexibility was not supported, the results suggest that people in a positive mood rely more on the process of visual sensing.