The WearCam device.

<p><i>Left</i>: Schematic view of the images recorded by the WearCam, highlighted are the interaction zone (top), the eyes reflected by the eye-mirror (middle) and the manipulation zone (bottom). Software for automatic monitoring of the child's gaze and detection of human faces in the camera images is used to quantify, among other factors, the frequency and length of time during which the child looks at human faces. <i>Right</i>: The WearCam worn by a typically developing child.