Welcome to our Behavioral and Cognitive Sciences topic center. Here, gathered in various sub-topic areas, you will find practical scientific resources (e.g., on obtaining research grants, statistical methods, etc.), and introductions to fields of science of relevance to mental and medical health (e.g., Neuroscience, genetics, etc.). We offer this information as a resource for professionals and interested lay persons, and also as a way of illustrating the vital role played by scientists and researchers in the development of new medical and mental health knowledge. Whatever we know about a given medical or mental disorder, we know because scientists and researchers have carefully studied that disorder using the scientific method.