A baby sleeps with a panda toy while people wait for the arrival of giant pandas at Pairi Daiza Zoo, about 60 km southwest of Brussels, capital of Belgium, Feb 23, 2014. (Xinhua/Ye Pingfan)
CANBERRA, May 27 (Xinhua) -- Researchers in Australia studied babies' sleeping training and found scientific support that parents who allow their babies to cry themselves to sleep is effective and won't cause stress or other side effects, CNN reported.
The study included 43 sets of parents who have babies between 6 and 16 months old. These parents were divided into three groups for a three-month-experiment.
The first was called the "cry-it-out" group, with parents leaving the room immediately after they put their children to bed. The second group is called "bedtime fading," in which parents could stay in the room until the babies slept. And the third one is the control group, which the parents don't try sleep training.
A baby cries in a "baby-cry sumo" competition at Sensoji Temple in Tokyo, Japan, May 30, 2015. (Xinhua/Stringer)
The result showed that the "cry-it-out" group babies could fall asleep 15 minutes faster than those in the control group, while the "bedtime fading" group about 12 minutes faster.
Moreover, after the experiment continued for one year, the researchers found that the babies didn't show signs of stress or other behavioral problems.
"This is a concern that has been expressed by many parents, which is interesting to me as a scientist, as there is no compelling evidence to support this claim," said Michael Gradisar, lead author of the study and associate professor of psycholohy at Flinders University in Adelaide, Australia, as quoted by CNN.