Overview of coordinated attention bout types. (A) An example of coupled ROI streams from one infant (first row) and parent (second row), and bouts of coordinated attention (third row). Solid coordinated attention bouts depict ‘object-oriented coordinated attention’ and coordinated bouts with diagonal lines depict ‘face-oriented attention’. (B) Examples of seven types of coordinated attention (from left to right): Mutual Gaze, Parent:Object/Infant:Face, Parent:Face/Infant:Object, Parent:Triadic/Infant:Triadic, Parent:Triadic/Infant:Object, Parent:Object/Infant:Triadic, and Parent:Object/Infant:Object. White space reflects gaze to object ROIs other than the partner’s face or target ROI.