How many times do you need to view content before it is registered in your memory

Advertisers and content creators who attempt to engage their audience often rely on repeated exposures to ensure memorability. These content creators, intuitively, assume that showing an ad multiple times will increase the chance that its message will be registered in the viewer's memory. Once a memory is registered in memory, the chances that the concept it highlights will emerge spontaneously is higher. This spontaneous recall, in turn, is likely to probe a network of associations surrounding the memory and evoke various related prompts. In an objective empirical work where humans were exposed to stimuli repeatedly following a presentation of an oddball stimuli that broke the visual pattern, we see that two viewings of the same stimuli are sufficient for the brain to generate a single unified memory for the cue. If the third exposure is an oddball, the brain would respond in a pattern indicative of a deviation from baseline firing rate.