Theory of Intelligence Fluid and crystallized intelligence References Further reading Das, J.P. (2002). A better look at intelligence. Current Directions in Psychology, 11, 28–32. Goldstein, Gerald; Beers, Susan, eds (2004). Comprehensive Handbook of Psychological Assessment: Volume I: Intellectual and Neurological Assessment. Hoboken, NJ: John Wiley & Sons. Sattler, Jerome M. (2008). Assessment of Children: Cognitive Foundations. La Mesa (CA): Jerome M. Sattler, Publisher. External links Cognition Cognitive disorders Developmental disabilities Special education Pediatrics