There is a small window in a boy's life, between the ages of four and six, when he is strikingly emotionally perceptive and openly expressive — and a researcher who followed six boys through those years watched something quietly close inside them, one stage at a time

There is a stretch of early childhood, roughly between the ages of four and six, when a boy tends to read a room with real accuracy. He notices when a friend goes quiet. He says what he feels without much editing. He wants closeness and asks for it plainly. Then, across the two years that follow, a good deal of that begins to disappear from view.

The closest first-hand account of this shift we have come across sits in When Boys Become Boys, the 2014 book by Judy Y. Chu, published by NYU Press with a foreword by the psychologist Carol Gilligan, who sponsored the original fieldwork. Chu spent two years watching a small group of boys move from pre-kindergarten into first grade. What she recorded was not boys arriving at school already sealed off. It was boys learning, in stages, to appear that way.

This is one small study, not a settled consensus. Chu followed six boys at a single US school, watching closely rather than measuring a large sample. It should be read as a detailed account of a handful of children, not a law of male development.

What the study actually was

The design matters, because it shapes what the finding can carry. Chu was not running an experiment or a survey. She sat in on a classroom over two years, observed the same boys week after week, talked with them, and drew on interviews with their parents and input from their teachers. The method is ethnographic: sustained attention to a few children in one place, written down in detail.

Gilligan’s involvement places the work in a longer line of research. In In a Different Voice (1982), she had argued that developmental psychology carried a quiet masculine bias, treating boys as the default human and girls as a variation. Later she turned that lens the other way, asking what the field had missed about the inner lives of boys. Chu’s fieldwork was built to look closely at something the discipline had mostly skipped.

Six boys is not many.

The capacity that faded

Early on, Chu describes the boys as alert to other people. They picked up on feelings quickly, spoke about their own with little hesitation, and stayed present and direct with their friends. None of it looked effortful. It looked like ordinary competence at the human business of relating.

Over the two years, in her account, that directness thinned. The boys grew more guarded. They became more careful about what they showed, quicker to cover hurt, keener to signal toughness. Chu’s reading is that they were absorbing a rule: that being a boy meant, above all, not being a girl, and that the warm, attentive, expressive parts of themselves now read as the wrong team’s colours.

One thing the study does not claim is worth stating plainly. Chu watched boys only. She did not sit a boy beside a girl and measure who was more expressive. Across this body of work the argument concerns something other than a boys-versus-girls scoreboard. Emotional perceptiveness and open talk about feeling are human capacities that our culture happens to code as feminine, and young boys clearly have them before they learn to set them aside.

The same shape at other ages

What makes the pattern hard to wave away is that versions of it turn up elsewhere, in larger studies, at different ages. Chu’s six boys are the youngest end of a longer story.

Gilligan’s earlier work with Lyn Mikel Brown, gathered in Meeting at the Crossroads (Harvard University Press, 1992), followed close to a hundred girls across five years. Brown and Gilligan traced how girls who had been outspoken and sure of themselves in childhood often became hesitant and self-editing as they reached adolescence, losing the habit of saying directly what they felt and knew. The ages differed from Chu’s boys, but the movement rhymed: a confident early voice, then a learned quiet.

At the older end sits Deep Secrets (Harvard University Press, 2011), in which Niobe Way drew on hundreds of interviews with teenage boys, black, Latino, white and Asian American, across several years. Way found that boys in early and middle adolescence often spoke about their close male friendships with real tenderness and valued them intensely. By late adolescence, many had begun to pull back, treating that closeness as something to grow out of in order to count as men. She set out the same finding in her 2012 presidential address to the Society for Research on Adolescence, later published in the Journal of Research on Adolescence.

Read together, the three projects describe a recurring social lesson rather than a quirk of one classroom. That is the weight behind Chu’s small study: not the six boys on their own, but the way their path sits inside work with far larger numbers.

What to take from it, and what not to

The tempting move is to draw a straight line from a quiet five-year-old to a lonely fifty-year-old man, and to treat childhood socialisation as the proven cause of adult male isolation. The evidence stops well short of that. Chu observed six boys. Way interviewed adolescents, not the middle-aged men they became. These studies describe how the guardedness gets learned; they do not follow it across a whole life to measure what it costs later.

That is plausible, but it remains unproven.

Chu’s own framing is more ordinary than the harm story that tends to attach itself to findings like this. The boys were responding, sensibly, to what the people and the culture around them rewarded. They were reading the room accurately. Reading the room was the very skill teaching them to hide the rest.

None of this is a diagnosis, and it offers no instructions. It names a pattern that many parents and teachers will recognise once it is pointed out, and it suggests, gently, that the reticence we tend to file under “boys being boys” may be learned earlier, and more deliberately, than we assume. An account like this can describe a common shape. It cannot explain any particular child.

What the research keeps pointing at is that the capacity comes first and the guardedness is added afterward. A four-year-old who says exactly how he feels is not yet doing anything unusual for his age. Whether he still does it at fourteen has a lot to do with what those around him treat as acceptable in a boy.