By Kyle Hill via Scientific American Blog Network
True memories fade and false ones appear.
Each time we recall something, the memory is imperfectly re-stitched by our brains. Our memories retain familiarity but, like our childhood blankets, can be recognizable yet filled with holes and worn down with time.
To date, research has shown that it is fairly easy to take advantage of our fallible memory. Elizabeth Loftus, cognitive psychologist and expert on human memory, has found that simply changing one word in a question can contort what we recall. In one experiment, Loftus had participants watch a film of a car crash, and then asked about what they saw. They were either asked “How fast were the cars going when they hit each other,” or “How fast were the cars going when they smashed into each other.” One week later the participants returned for some memory questions. Loftus asked whether or not there was broken glass at the scene of the accident. Those participants that heard the word “smashed” were more than twice as likely to recall seeing broken glass than those who heard the word “hit.” Keep in mind, there was in fact no broken glass at the scene.
This kind of insight—that our memories are terrible camcorders of reality—had serious pop culture ramifications. “Repression” and “repressed memories” have entered our culture’s lexicon, without evidential support. Even with numerous accusations of sexual abuse and other childhood horrors filed in court with the explosion of “recovered memory therapy,” the same research pioneered by experts like Loftus has suggested that most if not all of these “repressed” memories are merely false ones. At CSICon, a skeptic’s conference earlier this year in Nashville, Tennessee, Loftus herself noted that the same techniques used to implant false memories in psychological experiments are precisely the techniques used by repression therapists to recover supposedly buried traumas.
Nearly four decades later, Loftus and colleagues aim to further memory science once again. Introducing a false memory in experiment can be done quickly and with some degree of reliability, but how long does the lie last? Surely bolstered by a digital age reverberating with misinformation, the results point to a disturbingly long half-life of lies.
Michael (at VSauce) is always entertaining. This video (made in 2012) is not as intense as his more recent works, but still thought provoking and entertaining. Enjoy 🙂
Pop culture tells us that some people have photographic memories. What’s the real story?
Remember when you were a kid and there was always someone in your class who claimed to have a photographic memory? If you believed it, as many children tend to do, you were probably both impressed and jealous. Then by the time you got older, you’d heard of people with savantism, and champions in memory contests, and people who could remember every day of their lives; and you probably wished that you too could have a photographic or eidetic memory. Well how would you feel if I told you that there might not be any such thing as those abilities?
That’s not to say that nobody has extraordinary or unusual memory prowess. Some do, and we’ll talk about those; but what we want to focus on today is the idea that some people have the pop-culture version of a “photographic memory” that we’ve all heard about, which sounds a bit like a superpower. They can, at will, call to mind the page of a book they’ve read, a license plate they saw, a long string of numbers, what have you; and simply read it off that image in their mind’s eye as if they’re seeing it live. What makes this such a great thing is that it doesn’t seem to come with any cost. They are not otherwise developmentally disabled, and haven’t had to trade other cognitive or behavioral functioning. This is the version of “photographic memory” that so many of us grew up believing in: the superpower version.
Not conspiratorial, but still fascinating stuff from VSauce (Michael Stevens) 🙂