September 6, 2010
Mind
Forget What You Know About Good Study
Habits
Every
September, millions of parents try a kind of psychological witchcraft, to
transform their summer-glazed campers into fall students, their video-bugs into
bookworms. Advice is cheap and all too familiar: Clear a quiet work space.
Stick to a homework schedule. Set goals. Set boundaries. Do not bribe (except
in emergencies).
And check
out the classroom. Does Junior’s learning style match the new teacher’s
approach? Or the school’s philosophy? Maybe the child isn’t “a good fit” for
the school.
Such theories
have developed in part because of sketchy education research that doesn’t offer
clear guidance. Student traits and teaching styles surely interact; so do
personalities and at-home rules. The trouble is, no one can predict how.
Yet there
are effective approaches to learning, at least for those who are motivated. In
recent years, cognitive scientists have shown that a few simple techniques can
reliably improve what matters most: how much a student learns from studying.
The
findings can help anyone, from a fourth grader doing long division to a retiree
taking on a new language. But they directly contradict much of the common
wisdom about good study habits, and they have not caught on.
For
instance, instead of sticking to one study location, simply alternating the
room where a person studies improves retention. So does studying distinct but
related skills or concepts in one sitting, rather than focusing intensely on a
single thing.
“We have
known these principles for some time, and it’s intriguing that schools don’t
pick them up, or that people don’t learn them by trial and error,” said Robert
A. Bjork, a psychologist at the University
of California, Los Angeles. “Instead, we walk around with all sorts of
unexamined beliefs about what works that are mistaken.”
Take the
notion that children have specific learning styles, that some are “visual
learners” and others are auditory; some are “left-brain” students, others
“right-brain.” In a recent review of the relevant research,
published in the journal Psychological Science in the Public Interest, a team
of psychologists found
almost zero support for such ideas. “The contrast between the enormous
popularity of the learning-styles approach within education and the lack of
credible evidence for its utility is, in our opinion, striking and disturbing,”
the researchers concluded.

Ditto for
teaching styles, researchers say. Some excellent instructors caper in front of
the blackboard like summer-theater Falstaffs; others are reserved to the point
of shyness. “We have yet to identify the common threads between teachers who
create a constructive learning atmosphere,” said Daniel T. Willingham, a
psychologist at the University of Virginia and
author of the book “Why Don’t Students Like School?”
But
individual learning is another matter, and psychologists have discovered that
some of the most hallowed advice on study habits is flat wrong. For instance,
many study skills courses insist that students find a specific place, a study
room or a quiet corner of the library, to take their work. The research finds
just the opposite. In one classic 1978 experiment, psychologists found that
college students who studied a list of 40 vocabulary words in two different
rooms — one windowless and cluttered, the other modern, with a view on a
courtyard — did far better on a test than students who studied the words twice,
in the same room. Later studies have confirmed the finding, for a variety of
topics.
The brain
makes subtle associations between what it is studying and the background
sensations it has at the time, the authors say, regardless of whether those
perceptions are conscious. It colors the terms of the Versailles Treaty with
the wasted fluorescent glow of the dorm study room, say; or the elements of the
Marshall Plan with the jade-curtain shade of the willow tree in the backyard.
Forcing the brain to make multiple associations with the same material may, in
effect, give that information more neural scaffolding.
“What we
think is happening here is that, when the outside context is varied, the
information is enriched, and this slows down forgetting,” said Dr. Bjork, the
senior author of the two-room experiment.
Varying
the type of material studied in a single sitting — alternating, for example,
among vocabulary, reading and speaking in a new language — seems to leave a
deeper impression on the brain than does concentrating on just one skill at a
time. Musicians have known this for years, and their practice sessions often
include a mix of scales, musical pieces and rhythmic work. Many athletes, too,
routinely mix their workouts with strength, speed and skill drills.
The
advantages of this approach to studying can be striking, in some topic areas. In a study recently posted online by the
journal Applied Cognitive Psychology, Doug Rohrer and Kelli Taylor of the
University of South Florida taught a group of fourth graders four equations,
each to calculate a different dimension of a prism. Half of the children
learned by studying repeated examples of one equation, say, calculating the
number of prism faces when given the number of sides at the base, then moving
on to the next type of calculation, studying repeated examples of that. The
other half studied mixed problem sets, which included examples of all four
types of calculations grouped together. Both groups solved sample problems
along the way, as they studied.
A day
later, the researchers gave all of the students a test on the material,
presenting new problems of the same type. The children who had studied mixed
sets did twice as well as the others, outscoring them 77 percent to 38 percent.
The researchers have found the same in experiments involving adults and younger
children.
“When
students see a list of problems, all of the same kind, they know the strategy
to use before they even read the problem,” said Dr. Rohrer. “That’s like riding
a bike with training wheels.” With mixed practice, he added, “each problem is
different from the last one, which means kids must learn how to choose the
appropriate procedure — just like they had to do on the test.”
These
findings extend well beyond math, even to aesthetic intuitive learning. In an experiment published last month in the
journal Psychology and Aging, researchers found that college students and
adults of retirement age were better able to distinguish the painting styles of
12 unfamiliar artists after viewing mixed collections (assortments, including
works from all 12) than after viewing a dozen works from one artist, all
together, then moving on to the next painter.
The
finding undermines the common assumption that intensive immersion is the best
way to really master a particular genre, or type of creative work, said Nate
Kornell, a psychologist at Williams College and the
lead author of the study. “What seems to be happening in this case is that the
brain is picking up deeper patterns when seeing assortments of paintings; it’s
picking up what’s similar and what’s different about them,” often
subconsciously.
Cognitive
scientists do not deny that honest-to-goodness cramming can lead to a better
grade on a given exam. But hurriedly jam-packing a brain is akin to
speed-packing a cheap suitcase, as most students quickly learn — it holds its
new load for a while, then most everything falls out.
“With
many students, it’s not like they can’t remember the material” when they move
to a more advanced class, said Henry L. Roediger III, a psychologist at Washington University in St.
Louis. “It’s like they’ve never seen it before.”
When the
neural suitcase is packed carefully and gradually, it holds its contents for
far, far longer. An hour of study tonight, an hour on the weekend, another
session a week from now: such so-called spacing improves later recall, without
requiring students to put in more overall study effort or pay more attention,
dozens of studies have found.
No one
knows for sure why. It may be that the brain, when it revisits material at a
later time, has to relearn some of what it has absorbed before adding new stuff
— and that that process is itself self-reinforcing.
“The idea
is that forgetting is the friend of learning,” said Dr. Kornell. “When you
forget something, it allows you to relearn, and do so effectively, the next
time you see it.”
That’s
one reason cognitive scientists see testing itself — or practice tests and
quizzes — as a powerful tool of learning, rather than merely assessment. The
process of retrieving an idea is not like pulling a book from a shelf; it seems
to fundamentally alter the way the information is subsequently stored, making
it far more accessible in the future.
Dr.
Roediger uses the analogy of the Heisenberg uncertainty principle in physics,
which holds that the act of measuring a property of a particle (position, for
example) reduces the accuracy with which you can know another property
(momentum, for example): “Testing not only measures knowledge but changes it,”
he says — and, happily, in the direction of more certainty, not less.
In one of his own experiments, Dr. Roediger and Jeffrey
Karpicke, who is now at Purdue University, had college students study science
passages from a reading comprehension test, in short study periods. When
students studied the same material twice, in back-to-back sessions, they did
very well on a test given immediately afterward, then began to forget the
material.
But if
they studied the passage just once and did a practice test in the second
session, they did very well on one test two days later, and another given a
week later.
“Testing
has such bad connotation; people think of standardized testing or teaching to
the test,” Dr. Roediger said. “Maybe we need to call it something else, but
this is one of the most powerful learning tools we have.”
Of
course, one reason the thought of testing tightens people’s stomachs is that
tests are so often hard. Paradoxically, it is just this difficulty that makes
them such effective study tools, research suggests. The harder it is to
remember something, the harder it is to later forget. This effect, which
researchers call “desirable difficulty,” is evident in daily life. The name of
the actor who played Linc in “The Mod Squad”? Francie’s brother in “A Tree
Grows in Brooklyn”? The name of the co-discoverer, with Newton, of calculus?
The more
mental sweat it takes to dig it out, the more securely it will be subsequently
anchored.
None of
which is to suggest that these techniques — alternating study environments,
mixing content, spacing study sessions, self-testing or all the above — will
turn a grade-A slacker into a grade-A student. Motivation matters. So do
impressing friends, making the hockey team and finding the nerve to text the
cute student in social studies.
“In lab
experiments, you’re able to control for all factors except the one you’re
studying,” said Dr. Willingham. “Not true in the classroom, in real life. All
of these things are interacting at the same time.”
But at
the very least, the cognitive techniques give parents and students, young and
old, something many did not have before: a study plan based on evidence, not schoolyard
folk wisdom, or empty theorizing.
