In this paper, a knowledge domain visualization approach is applied to the computational intelligence held. A so-called concept map based on the abstracts of the papers presented at the WCCI 2006 is constructed and analyzed. The concept map provides an overview of the computational intelligence field by visualizing the associations between the field's main concepts. To analyze recent developments in the computational intelligence field, the concept map is compared with a concept map based on abstracts of the WCCI 2002. The analysis presented in the paper provides insight into the structure of the computational intelligence field and into the most significant developments in the field during the last years.