['To investigate whether trends of TV exposure from age six to 18\xa0months and adult TV programmes were associated with behavioural concerns of 18-month-old Thai toddlers.', "There were 194 healthy infants recruited at age six months and followed up until 18\xa0months of age in this present cohort. TV exposure variables were assessed by interviewing in depth at both six- and 18-month-old visits. A mother of each participant rated the child's behaviours using the Child Behaviour Checklist.", 'Infants who were increasingly exposed to TV from age six to 18\xa0months with adult programmes since six months of age had higher pervasive developmental problems and oppositional defiant behaviours scores. Exposure to adult TV programmes at age six months was also associated with emotionally reactive problems, aggression and externalising behaviours in the final regression models.'] Does elevated background TV exposure over time increase behavioural scores of 18-month-old toddlers?