<P> In psychology , fluid and crystallized intelligence ( respectively abbreviated Gf and Gc ) are factors of general intelligence , originally identified by Raymond Cattell . Concepts of fluid and crystallized intelligence were further developed by Cattell 's student John L. Horn . </P>
<P> In psychology , fluid and crystallized intelligence ( respectively abbreviated Gf and Gc ) are factors of general intelligence , originally identified by Raymond Cattell . Concepts of fluid and crystallized intelligence were further developed by Cattell 's student John L. Horn . </P>
who came up with fluid and crystallized intelligence
who came up with fluid and crystallized intelligence
John L. Horn
John L. Horn