This was triggered by an experimenter who could see the children through a video monitor.
In the dark, the video monitor was not visible to human observers who were in the room with the monkey.
Infant fixation was monitored by observing the reflection of the video monitor in the infant's pupil.
Testing was conducted in a dark room with the subjects positioned 3 m away from the video monitor.
The images of the fundi were transferred to a video monitor for viewing, and were recorded on videotape every 3 days from days 0 to 60.
On each trial, the observer watched the infant's looking behavior on an auxiliary video monitor, and judged the side of the display screen at which the infant preferred to look.
A video monitor capable of displaying the underscan and overscan area of a video signal.
The film negative is developed and printed or telecined so that the images can be viewed on a projector or video monitor.
