Reading Passage B: The Value of Getting It Wrong
A For much of the twentieth century, many teachers worked on the assumption that errors should be avoided wherever possible. If a pupil practised a wrong answer, the reasoning went, the mistake would become fixed in memory and would later have to be unlearnt, which would take more effort than learning the material correctly in the first place. On this view, every wrong answer a pupil gave was a small step backwards. Lessons were therefore designed so that learners were shown correct information before being asked to recall it, and tests were reserved for the end of a unit, when students had, in theory, mastered the material. This approach is still common today, and it has an obvious appeal: it feels efficient, it is easy to plan, and students who rarely make mistakes tend to leave lessons feeling confident.
B Over the past two decades, however, a series of experiments has challenged the idea that errors are necessarily harmful. In one study at Northmoor University, the psychologist Ingrid Halvorsen asked two groups of students to learn the meanings of thirty unfamiliar words. Neither group was told that the study was about mistakes. The first group simply read each word together with its definition. The second group was shown the word on its own and asked to guess its meaning before the definition appeared on the screen. Almost all of the guesses were wrong, yet when the students were tested a week later, the second group remembered significantly more definitions. Halvorsen argues that an incorrect guess prepares the mind to receive the right answer: having committed themselves to a prediction, learners pay closer attention to the feedback that follows and notice more precisely how it differs from what they expected.
C Not all mistakes are equally useful, though. Later research by Desmond Kilbride found that the benefit depends heavily on how close the guess is to the truth. When students produced guesses that were related in meaning to the correct answer, suggesting "river" for a word that actually meant "stream", for example, they learnt more than those who simply read the material. But when the guesses were wild or random, the advantage disappeared. Kilbride concluded that errors help only when they activate knowledge connected to the target, so that the correct answer can be attached to something already stored in memory. He also noted that the effect seemed weaker among younger children, although he cautioned that his sample of under-twelves was too small to support firm conclusions.
D Feedback is another crucial factor. In a classroom trial involving 340 secondary-school pupils, the education researcher Priya Varadkar compared four groups. Three groups attempted a set of questions before being taught a new topic, while the fourth was simply taught it. Pupils who were given the correct answers immediately after their attempt performed best on a test a fortnight later, and those who received feedback a day later did almost as well. All four groups were then taught the topic in exactly the same way. However, pupils who attempted the questions but received no feedback at all performed worse than the group that had never attempted them, apparently because their mistakes went uncorrected. Varadkar's conclusion is that "the error is only the first half of the lesson"; without correction, it can indeed become fixed, just as earlier generations of teachers feared.
E There is also an emotional dimension to consider. Students who fear being wrong may avoid guessing at all, and some feel discouraged when their first attempts are marked as failures. Tobias Engström, who studies motivation in schools, has found that the benefits of early errors largely disappear when the attempts are graded. In his view, pre-questions should be presented as low-stakes warm-up activities, and teachers should explain to their classes why they are being asked questions they cannot yet answer. Where this was done, he reports, anxiety fell over the course of a term and students became more willing to take risks in class discussion.
F It would be wrong to conclude from all this that teachers should simply set more difficult questions. The research points to something more precise: errors are productive when they are plausible, quickly corrected and made in a setting where being wrong carries no penalty. These conditions are not difficult to meet, but they require a change of attitude as much as a change of method. In my view, the greatest obstacle is not a lack of evidence, which is now considerable, but the persistent belief, shared by many students as well as teachers, that a lesson without mistakes is a lesson that has gone well.