The First Ten Seconds: Why Some People Stay Sharp After 65

Give someone ten seconds to name as many animals as they can. Most of us start fast and then slow down, and by the end of the minute we are scraping. Researchers have long used this kind of task to measure how quickly the mind can find and produce words. What a group in Trieste, Italy, wanted to know was something more specific: in those first ten seconds, when retrieval is fast and automatic, why do some 70-year-olds keep pace with 25-year-olds while others do not?

Two studies from the same laboratory, published this summer and reported in early September, offer part of an answer. The first ingredient is familiar. The second is less so.

What the researchers did

Both studies come from the cognitive neuroscience group of Raffaella Rumiati at SISSA, the International School for Advanced Studies, and were carried out as part of Age-It, a national Italian programme on ageing well.

The first study, published in the journal Neuropsychology in August 2026, compared 38 young adults with 44 healthy older adults on verbal fluency tasks. Participants had to produce words starting with a given letter, words from a category, and words linked to an emotion, and the researchers concentrated on the first ten seconds of each attempt. Everyone also completed standard measures of vocabulary, working memory, cognitive reserve and emotion regulation.

The second study, published in Brain Sciences in July 2026, focused on working memory in 45 healthy adults aged 65 to 84. They saw a stream of happy, angry and neutral faces and had to say whether the current face matched one shown earlier, either on its expression or on its age category. An easier version compared each face with the one just before; a harder version compared it with the face two steps back. Before the task, each person filled in a cognitive reserve questionnaire and a self-rating scale of emotional intelligence, and all scored well above the dementia cut-off on a standard screening test.

What they found

The first ingredient is cognitive reserve. This is the researchers' term for mental resources built up over a lifetime through education, intellectually demanding work, and a mentally active life outside work. In the language study, older adults with higher cognitive reserve produced words in those first ten seconds at a level comparable to the young adults. In the working memory study, higher cognitive reserve went with higher accuracy across the board, regardless of how hard the task was, which faces appeared, or what participants were asked to judge about them.

The lead author of the working memory study, Stefania Lucia, put it this way: cognitive reserve supported the ability to hold and manipulate the information needed for the task, independently of the condition. That is what makes the finding interesting. It was not a niche effect that showed up in one corner of the experiment. It was general.

The second ingredient is emotion. In the language study, older adults retrieved positive words more easily than negative ones. In the working memory study, when the task was to judge facial expressions, happy faces were linked with faster responses and better accuracy than angry faces, and the gap was widest on the harder version. Emotional content, in other words, made older adults more efficient, but only when the emotion was relevant to what they were doing. When they were asked to ignore the expression and judge age instead, it made little difference.

Emotional intelligence, the self-rated ability to recognise, understand and manage emotions, behaved differently again. It was not linked with higher accuracy at all. What it changed was timing: people with higher scores took longer to respond to happy faces in the emotion task. The researchers' interpretation is that these participants were processing the emotional information more thoroughly rather than struggling with it, though as they acknowledge, the study did not measure the mental processes behind those responses, so that reading remains a possibility rather than a demonstrated fact.

What this does not show

These are small studies. Forty-five people in one, 82 across two age groups in the other. They are also cross-sectional: everyone was tested once, so the results describe differences between people at a single moment, not changes within a person over time. That matters for the obvious question. The studies show that people with more cognitive reserve performed better. They do not show that building cognitive reserve caused the better performance, and they cannot tell us that raising it later in life would prevent decline. Association is not cause, and the authors say so.

Emotional intelligence was measured by asking people to rate themselves, which is an imperfect instrument. Happy and angry faces may also differ in intensity or in how strongly they grab attention, which could account for some of the emotional effects without emotion itself being the driver. And the participants were healthy, well-screened volunteers, so nothing here speaks to people already living with cognitive impairment.

What a reader over 50 can take from it

Two things, held loosely.

The first is that the ingredients of cognitive reserve are not exotic. Education counts, but so does work that makes you think, and so does what you do with your evenings and weekends. The reserve framework does not say that it is too late to add to the pile after 50; it says that the pile is what shows up later, and that a mentally engaged life is associated, over and over across studies, with better performance in the years when performance is hardest to keep. If you were looking for permission to take the harder course, join the reading group, or keep the demanding hobby rather than retire from it, this is a reasonable place to find it.

The second is more tentative and more interesting. The Trieste results suggest that an older mind runs more efficiently when the material carries positive emotional weight and when that emotion is part of the job, not background noise. That is not a recipe. But it does hint that how something feels while you are learning it is not incidental to how well you retain it, and that the tendency many older adults have to lean towards the positive may be doing quiet cognitive work rather than simply being a mood.

This is part of why we built Treeny the way we did. The daily session is short and deliberately varied, so that the effort stays real without becoming grim, and Flo, your coach, adjusts the difficulty to where you actually are rather than where a chart says you should be. The aim is regular, engaged mental work you can keep up for years, because that, rather than any single exercise, is what the reserve idea is about.

The honest summary

Two small, careful studies from one Italian laboratory found that older adults with more lifetime mental engagement performed better on word-finding and working memory, and that positive emotional content made those tasks easier when it was relevant. The links are associations from a single test session, not evidence that any intervention prevents decline. Larger and longer studies are needed before anyone should promise more.

This article is for general information only and is not medical advice. If you are worried about your memory, thinking, or mood, please speak with a doctor or other qualified health professional.