The Baby Lab is a research lab on the University of Kansas Edwards campus in Overland Park, KS. We study how babies’ cognitive abilities change over time, particularly in the first year of life. We are interested how attention to different types of objects leads to the complex social abilities that emerge in infancy. Our equipment allows us to see exactly where on the screen a child is looking, and for how long, while recording video. The recording allows us to measure pupil diameter, which changes in response to certain types of scenes (for example, an emotional facial expression). We want to see if infants have this type of response to emotional facial expressions presented very rapidly.