Relationships between intellectual functioning and problem-solving among aged persons were viewed from several vantage points. The Cattell-Horn theory of fluid and crystallized abilities provided the rationale for selection of indicants of intelligence; the Davis (1966) two-factor theory served as a paradigm for the selection of two different kinds of problem-solving tasks. The relationships of education to each type of intelligence and problem-solving were also investigated. For a sample of 224 adults, aged 60 to 70 yr. of age, (1) Type O problem solving (has few prior associarions) is more highly related to fluid intelligence (Gf) than to crystallized intelligence (Gc). (2) The correlation between Gf and Gc is larger for relatively well educated than for relatively poorly educated adults. (3) There is no significant difference between the Gf and Gc correlations with Type C problem-solving (involving previously associated responses). (4) The Gf-Gc, Type O-C relationships are not removed when education is controlled.
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