3Further Reading on
Eye Coding: Nolan C (1987; play,1989) Under the Eye of the Clock.
4Further Reading on
Generalisation: Bower TGR & Wishart JG (1972) Stages in the
development of the object concept. Cognition 1(1).
II for information on obtaining software for use in enhancing
Colour perception: If the
learner can track objects (Section 12) and you would like to improve
your knowledge about his perception of colour, you might want to try
this technique. Present a ball of one colour and roll it back and
forth. If he follows the movement consistently, then roll it from
side to side through a tunnel (or behind a screen) to emerge at the
other side. If he follows the ball and then becomes disinterested,
have a different coloured ball emerge. If surprise is registered, you
then know he can perceive the difference between these two colours.