Babies who fail to reach a certain stage of development by the age of nine months are more likely to struggle at school and be less well behaved by the age of five, according to the Millennium Cohort Study.
The new analysis provides further evidence of life inequalities setting in from an early age.
Professor Heather Joshi, the group's director, considers how government policies affect behaviour trends.
Bookmark with:
What are these?
E-mail this to a friend