Why self-doubt hits harder at year-end? Neuroscientist reveals how your brain might be tricking you about your year-long progress

As the calendar nears its final pages, many people find themselves replaying the year with a harsher inner voice than usual. Goals feel unfinished, achievements seem smaller and progress appears questionable. According to a leading neuroscientist, this year-end self doubt may have less to do with reality and more to do with how the brain is wired to evaluate time.

Why year-end reflection feels unusually harsh

In a recent Instagram post, New York University neuroscientist Dr Wendy Suzuki explained why the closing months of the year often amplify self criticism. She noted that during year-end reflection, key brain systems shift into what she describes as evaluation mode.

According to Dr Suzuki, the prefrontal cortex and the default mode network become more active during this period. These regions are responsible for planning, self reflection and assessing past actions. However, when combined with the brain’s natural negativity bias, this evaluation tends to focus more on what was left undone rather than what was achieved.


The result, she explained, is a distorted mental summary of the year that highlights gaps and failures while overlooking growth.

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The illusion of failure your brain creates

Dr Suzuki pointed out that this mental pattern can create the illusion that the year was wasted, even when it included meaningful progress. In her Instagram post, she explained that the brain is not trying to be unkind. Instead, it is attempting to prepare for the future by scanning for what needs improvement.

This survival-oriented process, however, often tells an incomplete story. By prioritising unfinished tasks, the brain downplays moments of resilience, learning and joy that also shaped the year.

Her insights were shared as part of her Mindful Mondays series, where she regularly breaks down everyday mental experiences through the lens of neuroscience.

A simple exercise to reset the brain’s evaluation loop

To counter this negativity driven reflection, Dr Suzuki suggested a practical reframing exercise. She encouraged people to recall the year in three specific moments. One moment of growth, one moment of resilience and one moment of joy.

According to her, this approach helps reset the brain’s evaluation loop, allowing a more balanced and accurate view of the past year. By deliberately guiding attention toward positive experiences, the brain is reminded that progress is not always measured by completed checklists alone.

Dr Wendy Suzuki is an American neuroscientist and professor at the New York University Center for Neural Science. She is widely known for her research on neuroplasticity and how lifestyle factors such as exercise influence brain function. She is also the author of Healthy Brain, Happy Life, which explores practical ways to strengthen cognitive health.

Dr Suzuki’s message offers a timely reminder that year-end self assessment is often shaped by neural shortcuts rather than objective truth. Understanding how the brain evaluates progress can help soften the inner critic and replace it with a more compassionate perspective.