Fig. 2

An example image provided to families, showcasing a stuffed animal wearing a mock head mounted eye-tracking device. The following caption accompanied the image for families practicing with the mock head-mounted eye-tracking device at home: “Please place the hat so that the setup resembles the one pictured above. The strip of Velcro should run along the front of the head. The knob on the headband should be placed at the center of the forehead (above the nose) and the eye-tracker (the bent pipe cleaner) should be pointed towards the eye as shown. The box should go over the child’s right shoulder – this will be attached to the back of the chair your child will be sitting in during the play session”