When Turkle describes her clients' concern, it's a concern with quality of interaction, not quantity. The studies mentioned later deal with quantity: people who

When Turkle describes her clients' concern, it's a concern with quality of interaction, not quantity. The studies mentioned later deal with quantity: people who text more spend more time with friends. I don't blame the researchers for studying this, it's easy to quantify. But it also doesn't provide much insight.