Working memory distractions study shows rapid priority shifts
University of Texas at Austin researchers found people re-prioritize one remembered target after interruptions in a Snake-like task.
By Tom Brennan · Health & Medicine Correspondent
3 min read
A working memory distractions study from the University of Texas at Austin suggests the brain can quickly reshuffle which short-term memory gets priority after an interruption. The finding, published in Communications Psychology, helps explain how people return to a task after something unexpected pulls them off course.
Working memory is the short-term mental system people use to hold and work with information needed for an immediate goal. Researchers Ziyao Zhang, Jarrod A. Lewis-Peacock and colleagues studied how that system responds when a person’s position or plan changes during a task.
What did the working memory distractions study find?
The researchers found that participants tended to favor the remembered target closest to their current position, according to the paper. After an interruption changed where they were in the task, they shifted priority toward the target that had become most relevant from that new position.
The study also found limits to that flexibility. According to Zhang and Lewis-Peacock, higher memory loads reduced participants’ ability to redistribute attention, and after a distraction, reliance on working memory was limited to a single item regardless of how many targets had been memorized.
How the Snake task tested memory
The team ran experiments with 50 adult participants using a version of the arcade game Snake. Players steered a snake around a rectangular field and had to collect apples whose locations had appeared only briefly, forcing them to rely on memory rather than visible cues.
Each trial required participants to remember one, two or four apple locations, according to the study. In half of the trials, an unexpected grape appeared and players had to collect it before returning to the hidden apples.
The setup let the researchers compare performance with and without interruptions. It also allowed them to test what happened when the surprise target changed the snake’s position, making a different memorized apple more useful to pursue next.
Why the finding matters for memory models
According to the authors, the results point to a dynamic redistribution process in working memory: people can update which stored item receives priority when a distraction forces a change in plan. That response may help people address an interruption while still preserving enough information to continue the original task.
The study frames working memory as flexible but constrained. Participants did not appear to give equal priority to every remembered apple after a distraction; instead, they usually treated one item as the main guide for the next action.
Zhang, Lewis-Peacock and colleagues said future research could examine the neural processes behind this kind of reorganization. The findings could also help refine working memory models and, eventually, inform brain-inspired computational systems, including artificial intelligence systems.
This story draws on original reporting from Medical Xpress.