I would first like to share an exercept from Paul Watzlawick’s book: How Real is Real?
In one experiment, two subjects, A and B, are seated facing a projection screen. There is a partition between them so that they cannot see each other, and they are requested not to communicate. They are then shown medical slides of healthy and sick cells and told that they must learn to recognize which is which by trial and error. In front of each of them are two buttons marked “Healthy” and “Sick,” respectively, and two signal lights marked “Right” and “Wrong.” Every time a slide is projected they have to press one of the buttons, whereupon one of the two signal lights flashes on.
“A” gets true feedback; that is, the lights tell him whether his guess was indeed right or wrong. His situation is one of simple discrimination, and in the ......