Intent Over Instinct: Telling Your Brain What to Remember Works Better Than You Think
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A new study reveals that consciously deciding to remember something-rather than relying on emotional impact or even a good night’s sleep-is the most effective way to solidify memories. Researchers found that intentional instruction substantially outperformed emotional association in recall tests, challenging long-held assumptions about how memories are formed.
The Power of Directed Recall
For years, scientists have understood that sleep plays a crucial role in memory consolidation, adn that emotionally charged events tend to be more vividly remembered. however, the relative influence of these factors-one largely involuntary, the other deliberate-remained unclear. This latest research,published October 7,2025,in Frontiers in Behavioral Neuroscience,suggests we have far more control over our memories than previously believed.
“What we intend to remember and to forget can be powerful,” stated Dr. Laura Kurdziel of Merrimack College, lead author of the study. “We have more control over our memories than we often think we do.”
How the Study Worked
To investigate this phenomenon, researchers conducted two parallel studies involving a total of 98 participants. In one study, 45 participants completed tasks online, while 53 participated in a controlled lab setting. Participants were presented with a series of 100 words, each followed by a cue instructing them to either “remember” or “forget” the word. Half of the words carried negative emotional connotations, while the other half were neutral. Instantly after, participants were tested on their recognition of the words, including 50 from the initial task and 50 “foils” – words they hadn’t seen before.A second recall test was administered 12 hours later.
For the lab-based participants completing the evening session, researchers utilized electroencephalogram (EEG) headbands to monitor brain activity during sleep. This allowed for a detailed analysis of
EEG data revealed that increased activity in the frontal cortex during sleep, specifically a measure of REM sleep, were associated with the misremembering of negative foils.
Conversely, sleep spindles – bursts of brainwave activity – were linked to better recall of negatively-associated, remember-cued words. These spindles are believed to facilitate the transfer of information from temporary hippocampal storage to more stable representations in the neocortex.
Interestingly, slow wave sleep showed a negative correlation with total recall, a finding that challenges the conventional wisdom linking slow wave sleep to declarative memory consolidation. Researchers suggest that slow wave sleep may instead play a role in actively forgetting irrelevant information.
Implications and Future Research
These findings suggest that sleep doesn’t universally consolidate memories, but rather prioritizes those we are motivated to remember, potentially at the expense of emotionally-driven recollections. However, Kurdziel cautions that more research is needed to confirm this hypothesis.
“The number of participants who provided usable EEG data was relatively small, which reduces confidence in the strength of sleep-memory associations,” Kurdziel noted. “Additionally, the sample consisted primarily of college students, making it challenging to generalize the findings to broader populations.”
Despite these limitations, the study offers a compelling insight into the power of directed attention and intentionality in shaping our memories. It suggests that actively engaging with information and consciously deciding what to remember can be more effective than simply hoping a good night’s sleep will do the trick.
More information: Top-Down Instruction outweighs Emotional Salience: Nocturnal Sleep Physiology Indicates Selective Memory Consolidation, Frontiers in Behavioral Neuroscience (2025). DOI: 10.3389/fnbeh.2025.1643449
Citation: Instructions help you remember something better than emotions or a good night’s sleep, scientists find (2025, October 7) retrieved 7 October 2025 from https://medicalxpress.com/news/2025-10-emotions-good-night-scientists.html
