“Face-to-face communication is very fast, both in adults and mothers and infants,” Beebe says. “When we watch people interacting in real time, we often do not see subtle aspects of the interaction. When we slow it down, and view it second by second, or by fractions of seconds, we see a new subterranean world of the details of interactions. Viewing the film frame-by-frame is like having a social microscope. You can see how each person affects the other, moment by moment. You can see who acted first- did the infant turn his head away first, and then the mother moved her head in close, looming in? Or did the mother loom in first, and then the infant turned his head away?” .