Logical positivists have never taken psychology into account in their epistemology, but they affirm that logical beings and mathematical beings are nothing but linguistic structures.

The first type of abstraction from objects I shall refer to as simple abstraction, but the second type I shall call reflective abstraction, using this term in a double sense... view

By: Jean Piaget



From this time on, the universe is built up into an aggregate of permanent objects connected by causal relations that are independent of the subject and are placed in objective space and time... view

By: Jean Piaget



Knowing reality means constructing systems of transformations that correspond, more or less adequately, to reality... view

By: Jean Piaget



Scientific knowledge is in perpetual evolution.. view

By: Jean Piaget



The self thus becomes aware of itself, at least in its practical action, and discovers itself as a cause among other causes and as an object subject to the same laws as other objects... view

By: Jean Piaget



The more the schemata are differentiated, the smaller the gap between the new and the familiar becomes, so that novelty, instead of constituting an annoyance avoided by the subject, becomes a problem and invites searching... view

By: Jean Piaget



During the earliest stages the child perceives things like a solipsist who is unaware of himself as subject and is familiar only with his own actions... view

By: Jean Piaget



Our problem, from the point of view of psychology and from the point of view of genetic epistemology, is to explain how the transition is made from a lower level of knowledge to a level that is judged to be higher... view

By: Jean Piaget



Scientific thought, then, is not momentary.. view

By: Jean Piaget



This means that no single logic is strong enough to support the total construction of human knowledge... view

By: Jean Piaget



Reflective abstraction, however, is based not on individual actions but on coordinated actions... view

By: Jean Piaget

