Simon & Chabris

Question 1

inattentional blindness

Answer 1

when we are attentive to another object/task we often fail to notice an unexpected object even if it appears at the point of fixation.

Question 2

what is the aim of this study?

Answer 2

whether unusual events are more likely to be seen.
level of difficulty of task was also tested if a higher difficulty increases rate of inattentional blindness.