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Students overestimate memory, underestimate studying
Why don't your students spend more time studying? It may be because they are
overconfident about their memories and are underestimating the amount they will
learn by studying, according to a recent study in the Journal of
Experimental Psychology.
"When asked (essentially outright) about the effects of studying, our
participants underestimated the amount they would learn by studying-- by more
than 50% in the current experiments--even when warned not to do so," the authors
write.
Students may be deluded by the "stability bias," a belief that their memories
are more stable than they actually are, the researchers say. People are prone to
think of their memory as something like a computer's hard drive, the authors
write.
In a series of 12 experiments, undergraduate students were presented with
word pairs and asked to predict how well they would remember the second word
when cued with the first word on a later test. The number of times they were
told they would be allowed to study and the number of tests they would take
varied from 1-4. Item difficulty varied across the experiments. Particpants were
asked to predict how they would perform item by item. In one experiment, they
were asked to predict their chance of forgetting the 2nd word in an item. In
another, participants were explicitly warned not to underestimate how much they
would learn by studying.
"Despite gain in actual learning that were often very large, our participants
predicted that they would learn little or nothing as a result of future study
opportunities and seemed to make predictions based on the current state of their
memories," the researchers say.
"This underestimation even occurred, in some cases, when they had already
experienced large increased in their own test performance across previous test
trials."
Students who had one study-test cycle and students who had 4 study-test
cycles predicted recall levels of 35% and 30%, respectively. Actual recall was
5% and 71%, respectively. A curious finding was that students showed less
confidence the more study-test cycles they had.
"A Stability Bias in Human Memory: Overestimating Remembering and
Underestimating Learning," by Nate Kornell and Robert Bjork, Journal of
Experimental Psychology, 2009, Volume 138, Number 4, pps. 449-468.
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