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Memory During Acute Stress Can Be Protected Using the Right Learning Strategy

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Highlights
  • People under stress are less effective at retrieving information from memory.
  • Learning through conventional study practice, by re-reading material to memorize it, affects memory during stress.
  • Learning through retrieval practice, can protect memory against the adverse effects of stress.

Memory During Acute Stress Can Be Protected Using the Right Learning Strategy

Learning by taking practice tests, a strategy known as retrieval practice, can protect memory against the negative effects of stress.

The report by scientists from Tufts University is published in Science on Nov. 25.

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What is Retrieval Practice

"Retrieval practice" is a learning strategy that focuses on getting the information out of the patients' head.

Through the act of retrieval, or calling information to mind, the memory for that particular information is strengthened and forgetting is less likely to occur.
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Retrieval practice is a powerful tool for improving learning without more technology, money, or class time.

Retrieval Practice Vs Memorization

Researchers enrolled 120 people for the experiment.

The research team asked participants to learn a set of 30 words and 30 images.

These were introduced through a computer program, which displayed one item at a time for a few seconds each.

To simulate note taking, participants were given 10 seconds to type a sentence using the item immediately after seeing it.

One group of participants then studied using retrieval practice, and took timed practice tests in which they freely recalled as many items as they could remember.

The other group used study practice.

For these participants, items were re-displayed on the computer screen, one at a time, for a few seconds each. Participants were given multiple timed periods to study.

After a 24-hour break, half of each group was placed into a stress-inducing scenario.

These participants were required to give an unexpected, impromptu speech and solve math problems in front of two judges, three peers and a video camera.

Participants took two memory tests, in which they recalled the words or images they studied the previous day.

These tests were taken during the stress scenario and twenty minutes after, to examine memory under immediate and delayed stress responses.

The remaining study participants took their memory tests during and after a time-matched, non-stressful task.

Outcome of Retrieval Practice

Stressed individuals who learned through retrieval practice remembered an average of around 11 items out of each set of 30 words and images, compared to 10 items for their non-stressed counterparts.

Participants who learned through study practice remembered fewer words overall, with an average of 7 items for stressed individuals and an average of a little under 9 items for those who were not stressed.

Out of those, the participants who learned a series of words and images by retrieval practice showed no impairment in memory after experiencing acute stress.

On the other hand, participants who used study practice, the conventional method of re-reading material to memorize it, remembered fewer items overall, particularly after stress.

Typically, people under stress are less effective at retrieving information from memory.

"We now show for the first time that the right learning strategy, in this case retrieval practice or taking practice tests, results in such strong memory representations that even under high levels of stress, subjects are still able to access their memories," said senior study author Ayanna Thomas, Ph.D., associate professor of psychology at Tufts.

The results suggest that it is not necessarily a matter of how much or how long someone studies, but how they study.

Learning by taking tests and being forced to retrieve information over and over has a strong effect on long-term memory retention, and appears to continue to have great benefits in high-stakes, stressful situations.

While previous evidence has shown that stress impairs memory, only few studies have examined whether this relationship can be affected by different learning strategies.

The current results now suggest that learning information in an effective manner, such as through retrieval practice, can protect memory against the adverse effects of stress.

Future Challenges

"Our one study is certainly not the final say on how retrieval practice influences memory under stress, but I can see this being applicable to any individual who has to retrieve complex information under high stakes," Thomas said.

The researchers note that stress effects are variable between individuals and additional work is needed to expand on their results.

The team is now engaged in studies to replicate and extend their findings, including whether retrieval practice can benefit complex situations such as learning a foreign language or stressful scenarios outside of a testing environment.

References
  1. Retrieval Practice - (http://www.retrievalpractice.org/)


Source: Medindia

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