Studies of Concept Invention Open PDF Document Details Document Type Technical Report Publication Date Apr 01, 1963 Accession Number AD0401291 Entities People Lee J. Cronbach Organizations University of Illinois Urbana–Champaign Tags Communities of Interest Materials and Manufacturing Processes DTIC Thesaurus Topics Accuracy Aircrafts Concept Formation Data Analysis Education Errors Feedback Hypotheses Learning Mathematical Models Military Research Models Psychology Steady State Students Training Universities