Amanda Lawrence, Ph.D., and Daniel Choe, Ph.D., found associations between young preschool-aged children's performance on behavioral measures of self-regulation and their parent-reported age at which they began using screen media devices and their current amount of screen media device use. Children who began using screen media devices at a young age and those who currently spent more hours per week specifically using mobile screen devices, such as smart phones and tablets, performed more poorly on self-regulation measures.
