1. (1999) Learning and individual differences: Process, trait, and content determinants. Washington DC: American Psychological Association.
2. Ackerman, P. (1996) A theory of adult development: Process, personality, interests, and knowledge Intelligence, 22, pp. 227 - 257.
3. Wade, C. and Tavris, C.(1993) Critical and creative thinking. New York : HarperCollins.
4. West, R. and Stanovich, K. (1991) The incidental acquisition of information from reading Psychological Science, 2, pp. 325 - 330.
5. Ackerman, P. and Heggestad, E. (1997) Intelligence, personality, and interests: Evidence for overlapping traits Psychological Bulletin, 121, pp. 219 - 245.