—Standard genetic programming genotypes are generally highly disorganized and poorly structured, with little code replication. This is also true of existing developmental genetic programming systems [1], [2], which exploit regularity by using procedures, functional modules, or macros and parameters passing. By contrast, in biological developmental evolution, nature works through code duplication to generate modularity, regularity and hierarchy. Previous developmental approaches have only one level of evaluation for each individual - an approach which limits the advantages of modularity to the species rather than the individual, and hence inhibits selection of modularity. We argued in [3], [4] that evaluation during development is necessary for structural regularity to emerge. To confirm the benefits of developmental evaluation and the contribution of code duplication to nature, our new developmental process uses a new representation. Developmental Tree Adjoining Grammar Guided GP (...
Tuan Hao Hoang, Robert I. McKay, Daryl Essam, Nguy