When emotions strike, they leave a lasting trace in the brain, reaching far beyond the moment itself. A new study led by Chenyang (Leo) Lin from Boston University reveals that emotional or rewarding experiences can enhance memories of ordinary events that occur just before or after them. The research, published on September 24 in Science Advances, provides evidence that emotions can shape memory retention in specific and measurable ways.
Table of contents:
- Chenyang lin and the link between emotions and memory
- How rewards shaped what people remembered
- Joseph dunsmoor’s perspective and the role of strong memories
- Applications in therapy and education
Chenyang lin and the link between emotions and memory
Chenyang (Leo) Lin grew up in a southern Chinese city, far from forests. When he later hiked through New Hampshire’s woods, he was captivated by the tall trees and darting squirrels. “That was very new to me,” he recalled. That vivid hike remained in his memory, along with something more mundane — the chickens he had seen on his way to the trail.
Lin, a researcher focused on brain and behavior, sought to understand why unrelated experiences such as chickens and squirrels could become connected in memory. His team discovered that the brain binds together events that happen close in time through a mechanism known as tag and capture. This process allows a weak memory to become stronger when it is paired with an emotional or meaningful one. Similar studies have shown how dendrites physically link memories formed close together in time (read more here).
How rewards shaped what people remembered
Lin and his colleagues tested over 100 volunteers who viewed sequences of images on a computer. The images featured both animals, such as hamsters or sea stars, and everyday tools, such as hammers. Participants were told they would earn points for correctly identifying each image. Some received 900 points for recognizing a hamster as an animal and only 1 point for a hammer, while others received the opposite rewards.
The following day, participants took a surprise memory test. Those who had been given high rewards for identifying animals remembered about 50 percent of them, while those with smaller rewards recalled about 45 percent. Interestingly, the same reward pattern did not improve memory for tools. This suggests that the brain’s reward system enhances certain categories of memories more effectively than others. The results confirmed that associations are stronger within the same category and not across different ones.
The findings align with other studies showing that emotional intensity and attention affect how long memories last (see more).
Joseph dunsmoor’s perspective and the role of strong memories
Joseph Dunsmoor, a cognitive neuroscientist at the University of Texas at Austin, emphasized that everyday memories are usually temporary. He explained that the study demonstrates how a meaningful event can give earlier, weaker moments new significance. When the brain experiences something emotionally strong or rewarding, it releases proteins in the hippocampus that strengthen nearby memory traces. This mechanism helps ordinary events “stick” to powerful ones.
Lin’s team also observed that people formed new memories more effectively after receiving a large reward. The brain, once activated by excitement, remains open to learning. This heightened state allows new information to be stored with greater persistence.
Applications in therapy and education
Understanding how emotions influence memory could benefit both psychology and education.
Therapists may use this knowledge to help patients process trauma by reinforcing neutral or positive moments that occurred before a painful event. Teachers could design lessons that trigger engagement and emotional interest — for instance, incorporating unexpected actions during learning activities.
Research on emotional arousal and focus supports the idea that meaningful experiences help anchor new knowledge and reduce forgetfulness (more here).
The study led by Lin provides concrete evidence that emotions do not just color our memories — they build the very framework that holds them together, transforming fleeting experiences into long-lasting recollections.
Source: Science News Explores
FAQ
Who conducted the study on emotions and memory?
The research was led by Chenyang (Leo) Lin, a brain and behavior expert from Boston University in Massachusetts.
When and where were the study results published?
The results were published on September 24 in the journal Science Advances.
What is the main finding of the study?
The study found that emotional or rewarding experiences can enhance memories of ordinary moments that occur just before or after them.
How many participants were involved in the research?
More than 100 people took part in the experiments conducted by Lin’s team.
What is the tag and capture mechanism?
Tag and capture is a process where weak memories become stronger when paired with emotional or meaningful experiences, helping them last longer.
What role did Joseph Dunsmoor play in the study?
Joseph Dunsmoor, a cognitive neuroscientist at the University of Texas at Austin, commented on the study, noting that it demonstrates how meaningful events can make earlier, weaker moments more significant.
How can this research help therapists?
Therapists can use these findings to help trauma patients strengthen positive or neutral memories that occurred before traumatic events, potentially reducing emotional distress.
How can educators apply these findings?
Teachers can create more engaging lessons by linking learning activities to emotional or physical experiences, which may improve long-term memory retention.
Did rewards affect memory equally for all items?
No, high rewards improved recall for animals but not for tools, showing that the effect depends on the category of the memory.
What broader implications does the study suggest?
The findings suggest that emotions shape the structure of memory itself, influencing how people learn, recall, and emotionally process experiences.