Accommodation, assimilation, object permanence, self conceptualization, etc. These are all terms and concepts that Piaget addresses with regard to intellectual development. By looking at children, how they behave, and how that behavior changes over time, Piaget has uncovered some interesting aspects concerning our cognitive development. He gains much of this information firsthand by witnessing and thoroughly recording the details of his own children as they grow up. Psychology is a field that fascinated me as I'm interested in the evolution of the psyche and self-consciousness. I believe that by examining the ontogenic evolution of humans, we can better understand our phylogenetic evolution. Developmental psychology is perhaps the best place to start with regard to the most important aspects of our ontogeny.