Sometimes the best decision is not always the familiar one. The mere exposure effect, also known as the familiarity effect, is when people chose preferred things, they’ve seen over things that are new. You can see why it is also called the familiarity effect because we tend to choose things that are familiar. This effect occurs even if the exposure is short and goes unnoticed by the viewer’s conscious mind. Therefore, the more someone has been exposed to something the more likely they are to like it.