The Invisible Gorilla: And Other Ways Our Intuitions Deceive Us by Christopher Chabris, Daniel Simons
Authors: Christopher Chabris, Daniel Simons
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immediately afterward. Chris recalls waking up late that morning, after the first plane had hit the World Trade Center. He listened to the
Howard Stern Show
on the radio until it ended around noon, at which point he turned on the TV. He got in touch with an Israeli colleague, who told him it was already obvious who the perpetrators must be, and he received an e-mail update from a friend who was living in Brooklyn, watching the events safely from her rooftop. He received another e-mail from the manager of his office building at Harvard, William James Hall, recommending evacuation.
Dan recalls working in his office that morning when his graduate student Stephen Mitroff came in to tell him that a plane hit the first tower. He spent the next few minutes seeking information online, and when the second plane hit, he turned on the television in his lab and he and his three graduate students watched the towers collapse. He then spent a few frantic minutes on the phone trying to reach his brother David’s girlfriend because David was traveling back from New York to Boston that morning (he was sitting on a plane waiting to take off from LaGuardia Airport when the attacks happened). Dan remembers becoming concerned that the fifteen-story building he was in might also be a target. He left before noon to pick up his wife in downtown Boston and they went home together and watched the television coverage for the rest of the day.
Neither of us has any idea what we were doing or whom we talked to the day before 9/11. We suspect that the same is true for you. Your memories of 9/11 are more vivid, detailed, and emotional than your memories of more ordinary events from that time period. Memories of dramatic events of personal or national importance often are recalled in greater detail. Some significant events appear to be imprinted in our minds in a way that lets us play them back in video-like detail, perfectly preserved despite the passage of time. This intuition is powerful and pervasive. It is also wrong.
Such detailed memories for a significant event were first studied systematically in 1899 by Frederick Colgrove as part of his doctoralresearch at Clark University. Colgrove asked 179 middle-aged and older adults where they were when they heard about the assassination of Abraham Lincoln. 34 Even though he asked people to recall events that happened more than thirty years earlier, 70 percent remembered where they were and how they heard about it, and some provided exceptional amounts of detail.
Nearly eighty years later, social psychologists Roger Brown and James Kulik coined the term
flashbulb memories
to characterize these vivid, detailed memories for surprising and important events. 35 The name, by analogy to photography, reflects the idea that the details surrounding surprising and emotionally significant events are preserved in the instant they occur: Events meriting permanent storage are imprinted in the brain just as a scene is imprinted onto film. According to Brown and Kulik, the memory is “very like a photograph that indiscriminately preserves the scene in which each of us found himself when the flashbulb was fired.”
In their study, Brown and Kulik surveyed eighty Americans (forty black and forty white) about a variety of events, most of which involved assassinations or attempted assassinations in the United States during the 1960s and 1970s. Much as Colgrove did before them, Brown and Kulik documented that all but one of their subjects had a flashbulb memory for the Kennedy assassination. Majorities had flashbulb memories for the assassinations of Bobby Kennedy and Martin Luther King, and many had flashbulb memories for other similar events.
In their research papers, Colgrove and Brown and Kulik provided vivid examples from their own memories to go along with the detailed, emotionally charged recollections their subjects had for these political assassinations. We all have such flashbulb experiences, and we can retrieve
Howard Stern Show
on the radio until it ended around noon, at which point he turned on the TV. He got in touch with an Israeli colleague, who told him it was already obvious who the perpetrators must be, and he received an e-mail update from a friend who was living in Brooklyn, watching the events safely from her rooftop. He received another e-mail from the manager of his office building at Harvard, William James Hall, recommending evacuation.
Dan recalls working in his office that morning when his graduate student Stephen Mitroff came in to tell him that a plane hit the first tower. He spent the next few minutes seeking information online, and when the second plane hit, he turned on the television in his lab and he and his three graduate students watched the towers collapse. He then spent a few frantic minutes on the phone trying to reach his brother David’s girlfriend because David was traveling back from New York to Boston that morning (he was sitting on a plane waiting to take off from LaGuardia Airport when the attacks happened). Dan remembers becoming concerned that the fifteen-story building he was in might also be a target. He left before noon to pick up his wife in downtown Boston and they went home together and watched the television coverage for the rest of the day.
Neither of us has any idea what we were doing or whom we talked to the day before 9/11. We suspect that the same is true for you. Your memories of 9/11 are more vivid, detailed, and emotional than your memories of more ordinary events from that time period. Memories of dramatic events of personal or national importance often are recalled in greater detail. Some significant events appear to be imprinted in our minds in a way that lets us play them back in video-like detail, perfectly preserved despite the passage of time. This intuition is powerful and pervasive. It is also wrong.
Such detailed memories for a significant event were first studied systematically in 1899 by Frederick Colgrove as part of his doctoralresearch at Clark University. Colgrove asked 179 middle-aged and older adults where they were when they heard about the assassination of Abraham Lincoln. 34 Even though he asked people to recall events that happened more than thirty years earlier, 70 percent remembered where they were and how they heard about it, and some provided exceptional amounts of detail.
Nearly eighty years later, social psychologists Roger Brown and James Kulik coined the term
flashbulb memories
to characterize these vivid, detailed memories for surprising and important events. 35 The name, by analogy to photography, reflects the idea that the details surrounding surprising and emotionally significant events are preserved in the instant they occur: Events meriting permanent storage are imprinted in the brain just as a scene is imprinted onto film. According to Brown and Kulik, the memory is “very like a photograph that indiscriminately preserves the scene in which each of us found himself when the flashbulb was fired.”
In their study, Brown and Kulik surveyed eighty Americans (forty black and forty white) about a variety of events, most of which involved assassinations or attempted assassinations in the United States during the 1960s and 1970s. Much as Colgrove did before them, Brown and Kulik documented that all but one of their subjects had a flashbulb memory for the Kennedy assassination. Majorities had flashbulb memories for the assassinations of Bobby Kennedy and Martin Luther King, and many had flashbulb memories for other similar events.
In their research papers, Colgrove and Brown and Kulik provided vivid examples from their own memories to go along with the detailed, emotionally charged recollections their subjects had for these political assassinations. We all have such flashbulb experiences, and we can retrieve
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