As the study notes: 'Dr Ana Maria Portugal, main researcher on the project points out “We are currently unable to conclude that the touchscreen use caused the

As the study notes: 'Dr Ana Maria Portugal, main researcher on the project points out “We are currently unable to conclude that the touchscreen use caused the differences in attention as it may also be that children who are generally more attracted to bright, colourful features seek out touchscreen devices more than those who are not.”' This is an important confounding factor. My opinion is that toddlers often spend time with media that are brighter and more colorful than the surrounding environment, e.g. animated videos for children or educational apps for young children. A better study would take that into account.