The study doesn't count the time "around children" but the time spent directly involved in the child's care like taking them to school, helping with homework, bathing them, playing with.
Before 1995, mothers spent an average of about 12 hours a week attending to the needs of their children. By 2007, that number had risen to 21.2 hours a week for college-educated women and 15.9 hours for those with less education.
Family researchers say the news should offer relief to guilt-stricken working parents.
..like myself. It really does. Between full-time job and household I often feel I am giving the kids not enough of my time. But interacting with them when I am totally stressed out is a recipe for desaster. Quality time before quantity.