A Viewer Closely Focused on a Complex Task, Such as Being

A viewer closely focused on a complex task, such as being asked to count how many times a group of people throw a ball back and forth, may miss other nonattended stimuli such as dancers moving through the group of people. This is due to an attentional phenomenon called

A) shadowing.
B) inattentional blindness.
C) filter failure.
D) differential blindness.