It's a father setting rules for his daughter (and himself while he's at it). Of course it's biased. What's odd about that? I'd understand if this was published as a study, but it's literally a NY Times article telling a story.
“Just one problem: I don’t have a child, so I needed to borrow one. Fortunately, my editor gleefully volunteered her 14-year-old, Sophie, to be a test subject.”