Enhancing the informed consent process: a conceptual overview.

Concern about limitations in the ability to give valid informed consent among certain groups of individuals has led to increased interest in defining, measuring, and enhancing consent-related decision-making. In this overview, we summarize issues related to the definition of decision-making capacity, discuss methods that have been used to assess decision-making abilities and other aspects of informed consent, and briefly describe studies that aim to understand variation in different elements of informed consent. We then review strategies that have been used with the intent of improving aspects of the informed consent process. Finally, we provide an outline of areas that are in need of future studies in order to reach the ultimate goal of preserving as much autonomy as possible in at-risk populations, while still achieving valuable research and treatment goals.