The feeling that time accelerates with age is a widely reported phenomenon, but the underlying neurological causes have remained elusive-until now. A new study published in Communications Biology offers potential insight, suggesting the brain’s slowing ability to process novel experiences contributes to the sensation of shrinking days. Researchers used fMRI technology to observe how brain activity differed between younger and older adults while viewing media, revealing a link between neural state transitions and our perception of time’s passage.
As we age, the feeling that time speeds up is a common experience, but the reasons behind this phenomenon have long puzzled scientists. Now, research published in Communications Biology suggests a possible explanation: the brain may process fewer events over time, remaining in the same neural state for longer periods, leading to the sensation that days are shrinking.
How Brain Changes Affect Our Perception of Time
The study, which offers new insights into how we experience the passage of time, focuses on how the brain breaks down what we see into separate units. Researchers involved 577 participants, ranging in age from 18 to 88, and used functional magnetic resonance imaging (fMRI) while they watched an eight-minute episode of Alfred Hitchcock Presents. The goal was to measure how often their neural networks shifted states – essentially, how often the brain recognized the beginning of a new event.
While younger participants showed highly dynamic brain activity with frequent transitions between states, older adults remained in the same neural configuration for longer, as if perceiving fewer changes within the narrative. This finding is significant because our subjective experience of time is closely linked to how our brains process information.
Researchers explain the phenomenon is similar to the difference between high-definition and low-resolution video. Fewer “mental frames” lead to a more compressed perception of time, making daily events seem less numerous and distinct. This slowing down is linked to de-differentiation neurale, a natural aging process where brain areas become less specialized.
For example, neurons that typically recognize faces may also activate in the presence of other objects, or individuals may struggle to distinguish between similar stimuli. As we age, neurons lose precision and tend to “generalize” more. When applied to time perception, this means registering fewer changes, fewer micro-events, and fewer internal transitions.
Slowing Down the Feeling of Accelerating Time
The sensation that “days fly by” may be a direct result of the brain updating its mental states less frequently. Researchers describe tempi di permanenza più lunghi – longer periods of staying within the same activity patterns – which alters our internal rhythm and how we perceive reality. It’s not that time itself is changing, but rather the frequency with which our minds “take snapshots” of events.
The fewer snapshots we take, the more quickly a month can seem to evaporate. This effect impacts memory, attention, processing speed, and the ability to distinguish the beginning and end of an episode. Ultimately, our perception of time becomes a reflection of our neural physiology, rather than a vague impression or cliché about aging.
If perceived time depends on the number of events the brain distinguishes, one way to counteract the feeling of acceleration is to introduce more novel stimuli into daily life. According to Steve Taylor, author of Time Expansion Experiences, the brain slows down subjective time when processing more information, as each new experience requires greater cognitive effort and generates more internal “markers.”
Traveling, learning a new skill, meeting new people, or changing routines can increase the density of perceived events, expanding our memory of time. This isn’t a psychological trick, but a physiological result of the mind working harder and registering more transitions between neural states.
Another key element is mindful attention. Neuroscience suggests that when we operate on autopilot, moving from one task to another without fully engaging, the brain produces fewer distinct moments, as if the day flows by as one long scene. Paying attention to details – a flavor, a landscape, a sound, the sensation of a daily gesture – increases the amount of information processed and enhances the fragmentation of events.
This explains why childhood often seems to last longer: every experience is new, every object is something to explore, and every environment generates a wealth of stimuli that expands perceived time. As we age and the world becomes more familiar, the amount of novelty the brain must process decreases, causing time to “slip” away. It doesn’t go faster, but rather the mind fragments it less.
Introducing new activities and cultivating more present attention doesn’t eliminate neural aging, but it can alter how we experience time. Some individuals report perceiving longer days or richer years after changing their habits, as if their internal rhythm has realigned. This isn’t about controlling time, but modulating perception – a way to restore depth to moments and counteract the feeling that years are compressing into one another. The research highlights that the mind can slow down its experience of time when it stops operating on autopilot and returns to registering the world more vividly.
