Fourteen TD participants (M = 16.39 months, SD = 6.38; 10 male, 4 female) were recruited from an established research database of children born in the state as language matched controls. An additional eight TD infants were recruited but excluded from analysis because cognitive and language testing were never completed (n = 2), language skills were too high to match with AD participants (>1.5 SD above average) (n = 2), or because of poor calibration to the eye tracker (n = 4). Cognitive and language testing results are provided in Table Table11.