ABSTRACT
This chapter provides information about how complex cognitive capabilities can be described in terms of more elementary cognitive processes. It focuses on a theory that recognizes several forms of intelligence. This chapter talks about two of these intelligences, crystallized intelligence (Gc) and fluid intelligence (Gf). To provide information of relevance for answering these general questions the chapter was directed, first, at replicating previous findings indicating that the decline of Gf can be accounted for in part by declines in CON, SAR and Gs; and, second, describing the extent to which, if at all, these process indicators account for age-related improvements in Gc independent of their association with Gf. In addition, analyses were directed at describing the extent of Gf decline with age when the measurement overlap of Gc is statistically controlled.
