Selection in Arithmetical Examples

Extract

Selection plays an important part in the life of the individual. It is a fundamental process which he must be able to apply in order to understand the world into which he is born. An individual placed amidst any set of circumstances does not assimilate the whole of them. He does not act like a camera plate, which reproduces automatically every feature of an external situation. The complex mental image which he forms from his surrounding circumstances is not an exact copy of the original environment.