What is the phenomenon of inattentional blindness?

Inattentional blindness refers to the psychological phenomenon where a person fails to notice a fully visible but unexpected object because attention is engaged on another task or aspect of the environment. This occurs when the focus is intentionally directed toward a specific stimulus, causing other visual stimuli to be overlooked.

The chosen answer accurately describes this phenomenon, highlighting that individuals can remain unaware of changes or objects in their visual field while their attention is absorbed elsewhere. This concept is often demonstrated in experiments where participants may miss significant changes or added elements in a scene they are observing as their focus is directed at a different task.

The other options address different concepts unrelated to inattentional blindness, emphasizing various aspects of visual perception and attention that do not capture the essence of the phenomenon.