Though the tremendous amount of recently-emerged developmentally-oriented research has produced much progress in understanding the personality, social, and emotional characteristics of persons with intellectual disabilities (ID), there is still much we don't know, and the vast task of precisely charting functioning in all these areas, while also identifying the associated fine-tuned, complex, and intertwined questions that crop up along the way, seems daunting and insurmountable.

The goal of The Oxford Handbook of Intellectual Disability and Development is to update the field...