ABSTRACT
A good reception strategy consists in being able to alter hypotheses appropriately in the face of each of these contingencies. At an even more primitive level, obviously, it consists in being able to recognize their existence and to formulate hypotheses in such a way that, whatever the contingency met, one know how and whether to change one's hypothesis. Two ideal strategies have been described in terms of a set of rules for constructing a first hypothesis and for changing it upon encountering various contingencies. The general question wish to ask is whether, on the whole, subjects adhere consistently to the rules of these strategies or whether, their behavior is random. Experimental operations can be sketched rapidly so that the design may be contrasted with some of the classical studies. At the outset the nature of the task is fully described for the subject. As noted earlier, an array of instances is constructed.
