Each night, millions of parents close the door of their child's room, convinced that he is sleeping peacefully. However, this certainty masks a very different reality. A recent study by researchers from Brown University, in collaboration with the Warren Alpert Medical School and the Rhode Island Hospital, reveals a striking gap between parental perceptions and sleep actually observed in children.
A parental perception largely disconnected from the reality of sleep
The study therefore highlights a significant disconnection between what parents believe they are the sleeping time of their child and the measured reality. Of the 102 primary children equipped with activating sensors, 83 % of parents thought that their child was sleeping enough, while only 14.7 % respected official recommendations from 9 to 12 hours per night for 6–12 year olds, defined by the American Academy of Pediatrics. Note that the activity measures sleep via the body movements, recorded by a sensor carried on the wrist.
The overestimation turns out to be clear. Parents reported an average duration of 9.58 hours. The objective data showed an actual sleep time of 8.32 hours. This difference of more than an hour is partly explained by two underestimated variables: the falling latency (time to fall asleep) and the spent time awake after falling asleep. Parents, often absent or already asleep at the time of these micro-acknowledgments, do not perceive these interruptions.
The problem is double. It is not only a quantitative, but also qualitative gap. Researchers point out that adults often confuse “put in bed” and “real sleep”, thus biasing their evaluation. This perception error compromises early detection of sleep disorders. The latter can have a direct impact on concentration, memory, emotional regulation or growth.
The authors call for better education of families on real sleep parameters, emphasizing the importance of measuring not only duration, but also the continuity and quality of sleep.
Night awakenings, dead angle of parental vigilance
One of the most enlightening aspects of the study thus concerns Waso (Wake After Sleep Onset), that is to say the time that children spend awakened after falling asleep. This parameter, not very visible for parents, constitutes a real blind spot in the family assessment of sleep. The sensors recorded an average of 38.27 minutes of Waso per night, while the parents reported less than 5 minutes.
This ditch reveals that many children have a fragmented sleep, escaping parental surveillance. Children can wake up briefly several times without getting up, talking or crying. They often remain calmly lying down, which prevents adults from spotting these awakenings. This absence of external signs contributes to the underestimation of the problem.
The authors of the study specify in a press release that this type of not detected awakening is not trivial. A fragmented sleep alters cognitive recovery, disturbs deep sleep cycles. He can generate mood disorders or attention difficulties during the day. Even more, these awakenings may not be reported by the children themselves. Indeed, they sometimes have no memories upon waking up.
The analysis also showed that daily assessments made by parents in sleep newspapers were not more reliable. Even by filling these questionnaires assiduously, adults regularly overestimated sleep time. Partly because they confused time in bed and actual sleep time, as mentioned above.
These results question the reliability of subjective tools often used in pediatrics or sleep epidemiology. Finally, they plead for a popularization of objective indicators with the general public, to help parents better detect alert signals.
Gaps marked between Latin and non-Latinos children
The study has integrated a dimension rarely explored in research on the sleep of children: ethnic disparities. Especially between Latin and non-Latinos children, in the USA. The results show net deviations, both on the quantity and quality of sleep. On the sample analyzed, 56 % of children came from Latin families. Among them, only 4.4 % respected official sleep recommendations, compared to 22.8 % in non-Latinos children.
Latin children slept on average 8.04 hours per night, compared to 8.53 hours for the others. The analysis of objective data also shows that the total time spent in bed was proven to be significantly shorter in the Latin group: 9.19 h against 9.69 h.
These differences could be influenced by cultural practices, such as later bedtime, co-sleeping or room sharing with an older child, more frequent in Latin families. These habits can delay falling asleep or cause more nocturnal micro-awakenings, while making their detection more difficult.
Another striking observation: while 88.9 % of Latin parents claimed that their child was sleeping “the right quantity”, their children were those who respected the standards the least. This contradiction highlights a possible cultural bias in the perception of sleep. However, these parents also declare that their child's sleep was a problem. This reflects a greater lucidity than in other groups, despite the overestimation of sleep time.
These results underline the need to better contextualize health data according to cultural practices. In addition, you must develop recommendations that take into account specific family and social realities.
An underestimated health alert and action levers still little used
Beyond the figures, the researchers draw attention to a silent health alarm. Lack of sleep, often chronic, affects a large part of primary children. And it could have lasting consequences on their physical, mental and cognitive health. Previous studies have already established a clear link between insufficient sleep and increased risks of learning disabilities, infantile obesity, anxiety, or even attention disorders (ADHD).
However, in daily practice, these issues remain underestimated by families and sometimes even by health professionals. Brown University researchers insist on the need to disseminate clear, but above all realistic recommendations. The simple message “Your child should sleep between 9 and 12 hours” is not enough. Especially if we do not specify what this implies in terms of environment, routine and vigilance on the indirect signs of fatigue.
Diana S. Grigsby-Toussaint recalls that simple gestures can significantly improve the quality of sleep. She quotes: Establish regular sleeping hours, limit the use of screens in the evening, expose children to natural light during the day, and promote physical activity. However, these advice, already well known, remain little coherently applied.
The study also highlights the limits of traditional tools. Certainly the parental questionnaires are useful, but insufficient if they are not accompanied by objective indicators or educational support. Ultimately, researchers are pleading to integrate the objective sleep measure in regular pediatric follow -ups. In particular via light devices such as activity.
This is a public health issue, which requires as much family awareness as an adaptation of prevention policies. Because to sleep better is not only a matter of duration, but also of recognition of sleep as a fundamental pillar of the development of the child.
Source: Aliana Rodriguez Acevedo et al., “Associations Between Objectively and Subjectively Measured Sleep Outcomes Among Elementary School Children in Rhode Island”. Frontiers in Pediatrics (2025)
With an unwavering passion for local news, Christopher leads our editorial team with integrity and dedication. With over 20 years’ experience, he is the backbone of Wouldsayso, ensuring that we stay true to our mission to inform.
