A study in Canada studied 5-month-old infants and their families with follow-up at 17, 29, 41 and 53 months, to estimate the influence of early childhood television exposure on academic, psychological & lifestyle characteristics in grade 4 (10 years of age).
Every additional hour of television exposure at 29 months corresponded to:
- 7 % & 6 % decreases in classroom engagement & achievement in mathematics
- 10 % increases in victimization by classmates
- 13 % decreases in time spent doing weekend physical activity
- 9 % decreases in activities involving physical effort
- Higher consumption of soft drinks & snacks
