HALPERN, E <br/><br/>
THE EFFECTS OF INCOMPATIBILITY BETWEEN PERCEPTION AND LOGIC IN PIAGET'S STAGE OF CONCRETE OPERATIONS.  [electronic resource] 

 -  Child development  Jun 1965 
 - 491-7 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0009-3920 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child<br/>Humans<br/>Logic<br/>Perception<br/>Thinking