One study of 2,500 children conducted at Children's Hospital in Seattle and published in April in the journal Pediatrics found that the more TV watched by toddlers aged 1 to 3, the greater their risk of attention problems at age 7.
Children increase their chance of becoming obese by 60percentt with each extra can or glass of sugar-sweetened beverage consumed per day, according to a widely referred to study of 548 middle-school children, conducted by researchers at Children's Hospital in Boston.
UNICEF and Save the Children conducted a preliminary study of 400 camps for displaced families and determined that there are approximately 3,000 children who lost at least one parent, and 1,100 who lost both their parents.
Kidscape, a British charity that helps prevent bullying and protects children, conducted a survey in which they assessed young people's cyber lives through an online questionnaire.
The survey of nearly 1,100 parents of school-age children – conducted by Opinium Research on behalf of Santander bank – also found that some parents were willing to pay a substantial premium to buy houses close to desirable schools.
Around 70 percent of children have suffered from some form of bullying online, according to a recent survey of 10,000 children conducted by the British charity Ditch the Label.
Dr. Hetland, whose work addresses college students as well as preschool and elementary-school children, conducted two comprehensive analyses of all the known studies of the subject as part of Project Zero's Reviewing Education in the Arts Project, which she served as manager.
Nice warned last year that up to 30% of people diagnosed with asthma did not show clear evidence of having the condition, while a study of 650 children conducted in the Netherlands and reported in the British Journal of General Practice on Friday suggested half those diagnosed with the condition were unlikely to have had it.
Trying to quantify an amorphous, fast-growing phenomenon, Mr. Williams said that in a survey of 5,000 Canadian children conducted this year for Media Awareness Network, a private group, one quarter said they had had an experience online that they did not like and that 5percentt had followed up an Internet encounter with a face-to-face meeting.
