Selective Attention Test

This is the task Daniel Kahneman is referring to in his book Thinking, Fast and Slow on page 23-24















Kahneman states "Seeing and orienting are automatic functions of System 1, but they depend on the allocation of some attention to the relevant stimulus. The authros note that the most remarkable observation of their study is that people find its results very surprising. Indeed, the viewers who fail to see the gorilla are initially sure that it was not there - they cannot imagine missing such a striking event. The gorilla study illustrates two important facts about our minds: we can be blind to the obvious, and we are also blind to our blindness." (emphasis mine, p. 24)