Do you see a light bulb? If you scan the picture, and scan some more, eventually you will find an image of a light bulb. The simple game teaches a lesson about how information gets into short-term memory. Finding the light bulb requires attentional effort. Once you do find it, an image of the light bulb makes its way to your short-term memory. Images of most of the other people, animals, and objects—the ones you scanned past when looking for the light bulb—will not be in your short-term memory, because you did not devote attentional effort to them. Stimuli to which you devote attentional effort thus are those most likely to move from sensory memory to short-term memory.