This study attempts to assess differences in the three aspects of cognitive complexity--differentiation, discrimination, and integration--as functions of information about and interest in the relevant domain. The two groups of subjects consisted of 20 members of a local sports car club and an equal number from a local garden club. Each group had high interest and information in one domain and, at most, average interest and information in the other domain. Each subject filled out a form on 20 flowers and a form on 20 cars. Multidimensional scalings revealed pronounced differences in integration, possible differences in discrimination, and virtually no differences in differentiation when the between-domain and within-domain judgments were compared. (TS)