Unstructured Free Time Linked to Teen Offending Across 21 Countries

In more than a thousand schools across 21 countries, teenagers sat down with tablets and answered questions no police record could settle. Had they ever walked into a store, taken something, and left without paying. Had they joined a group fight, dealt drugs, posted an intimate image of someone without consent. The same anonymous survey then asked how they spent their hours: studying, gaming, hanging out in the street, eating with family. When researchers lined up the two sets of answers for 58,425 adolescents aged 13 to 17, one pattern held in nearly every country.

The stakes are not abstract. Homicide alone killed an average of 52 people per hour worldwide in 2021, more than armed conflict and terrorism combined, according to the United Nations, and the young are pulled deep into that violence: about 44 percent of people brought into formal contact with police for homicide are aged 15 to 29, though that age band holds only 23 percent of the world’s population. The new study, published in May in PLOS ONE, does not try to explain all of that violence. It asks something narrower and more practical: does the structure of a teenager’s free time track whether that teenager offends?

The researchers, members of the International Self-Report Delinquency Study consortium, sorted a teenager’s day into categories. Unstructured spare time means amusement and relaxation with no predetermined agenda, and it came in two forms: outside the home (hanging about streets and shopping centers, evening parties, skipping class) and at home (online games, social media, adult sites, gambling, the darknet). Structured time at home covered homework, searching for school information, and family meals. Everything else, school, work, sleep, counted as non-spare time. Frequency answers were converted into weekly hours and standardized to a 24-hour day, and the averages look familiar: 13.7 hours of school, work, and sleep; 6.0 hours of unstructured time at home; 3.6 hours of structured time at home; and 0.7 hours of unstructured time outside the home.

That last slice, less than an hour a day, carried an outsized signal. Adolescents reporting no offenses averaged 6.4 hours of unstructured time daily, low-frequency offenders averaged 7.5, and high-frequency offenders, the roughly 5 percent who concentrate most incidents, averaged 8.8. The step up from non-offenders to heavy offenders appeared in every country studied.

Only Delinquent Friends Ranked Higher

To see whether time itself was doing the work, the team estimated offending while adjusting for the classic predictors of adolescent crime: self-control, parental control, morality, exposure to crime, and having delinquent peers, plus gender, age, and family deprivation. Unstructured time outside the home survived the adjustment with one of the largest associations in the models. It ran about even with self-control, in the opposite direction, and ahead of parental control and morality in most national samples. Only delinquent friends ranked higher, and that is the field’s most seasoned finding: the tie between a teenager’s offending and their friends’ offending is among the best-documented regularities in criminology. Structured time at home, by contrast, was associated with less offending, a pull in the protective direction.

“When we combine delinquent peers and unstructured free time, we have a particularly problematic combination,” said Marina Rezende Bazon, a psychologist at the University of São Paulo who coordinates the study’s Brazilian team. She defines the risky hours as the ones when young people “wander around without a specific goal, often in contexts of vulnerability and exposure to criminal opportunities.”

One Country Broke the Pattern

One questionnaire on one day can’t prove that idle hours push anyone toward crime; teenagers already drifting into delinquency may seek out exactly the unstructured time the survey counts. What argues for taking the association seriously is its reach. When the models were run separately in each country, twenty of the twenty-one samples showed a significant link between unstructured time outside the home and at least one measure of offending, in high-offending contexts like Spain and Argentina and in moderate ones like Iceland and Norway. Lithuania was the lone exception, with no significant link to either outcome. Colombia and Venezuela each showed the association on only one of the two measures, from opposite sides.

The digital version of idle time behaved less predictably. Unstructured hours at home were significantly tied to offending in fewer than half the countries, and the out-of-home measure weakened for cybercrime specifically, which is logical for a variable built from streets and parties. The Brazilian data add a wrinkle about who is online and unwatched: “Girls have always been more closely supervised by their families than boys,” Bazon said. “But in the online environment, that difference has narrowed significantly.” Female participation in online offenses, especially attacks on other people’s appearance, was among the findings that stood out.

What Redirecting a Fifth of Those Hours Could Buy

The team then ran 500 bootstrapped simulations, asking what the models imply if unstructured time outside the home were cut. A 10 percent reduction was associated, on paper, with 5.0 percent fewer adolescents offending and 3.9 percent fewer offenses; a 20 percent reduction with drops of 9.6 and 7.4 percent. In Bosnia and Herzegovina, the simulated 20 percent shift corresponded to a 22 percent lower prevalence of offending, and in Argentina, 16 percent. These are projections from correlations, not the results of any real program.

Real-world evidence about filling those hours is encouraging but thinner than the simulations, and the survey itself measured no structured time outside the home at all, so the activities policymakers would actually expand sit outside the data. What exists leans positive. When austerity closed 30 percent of London’s youth clubs between 2010 and 2019, teenagers in affected neighborhoods became 14 percent more likely to commit crimes and scored nearly 4 percent worse on national exams. Sports programs built for crime prevention show a moderate average effect on crime-related outcomes across the evaluations rigorous enough to pool. After-school programs look weaker: an evidence review puts their average effect at roughly an 8 percent reduction in delinquency and notes that programs offering only recreation, with no academic or skills content, were the least effective. What fills the hours, not just whether they are filled, appears to matter.

The sharpest limit sits outside the dataset. The survey reached only teenagers who were in school that day; the adolescents Bazon worries about most never saw a tablet. “If unstructured free time is already an important factor even among students,” she said, “imagine what it’s like for adolescents who have dropped out of school and spend years completely disconnected from conventional institutions.” The consortium’s next survey wave, now in preparation, will probe online hate, misogyny, and childhood adversity. It will still be looking for the kids the classroom no longer holds.

FAQ

Does unsupervised free time cause teenagers to commit crimes?
This study cannot say. Every measure came from one questionnaire on one day, so idle hours and offending may both flow from something else, and teenagers already involved in crime may gravitate toward unstructured time. The simulations about cutting free time are projections from correlations, not trial results. Establishing cause requires longitudinal or experimental research.

What exactly counts as unstructured spare time?
Time spent on amusement or relaxation with no predetermined agenda and no adult supervision. The study split it into time outside the home (hanging out in streets and shopping centers, evening parties, skipping class) and time at home (online games, social media, gambling, the darknet). Structured time, such as homework, searching for school information, and family meals, was analyzed separately and was associated with less offending.

How did researchers measure crime without police records?
Through self-report. Instead of asking whether a teenager had committed a crime, the anonymous survey described concrete acts, for example entering a store, taking an item, and leaving without paying, and asked whether the respondent had done them. The method is decades old and captures offenses that never reach official statistics. “Adolescents tend to respond quite honestly when anonymity is guaranteed,” said Bazon.

Is time online at home just as risky as time on the streets?
Not in these data. Unstructured time at home was tied to offending in fewer than half the countries, and the street-based measure weakened for cybercrime. Bazon cautions that unmediated online time is both a risk and a normal part of teenage social life, so the answer is less about counting screen hours and more about supervision, digital education, and platform accountability.

What should parents or local governments do with this?
The authors argue for expanding structured options teenagers actually want, such as sports, arts, and community programs, rather than simply restricting free time. Outside evidence is encouraging but modest, and one review found recreation-only programs were the least effective, so quality and content matter. The goal, as the paper puts it, is not to curtail adolescents’ autonomy but to widen the supply of supervised, meaningful ways to spend an afternoon.