Online data repository of research in the cognitive sciences Sharing data is an important part of science (e.g., see APA discussion). It's also often useful to be able to have access to datasets when teaching students how to analyse data in the cognitive sciences.


What online data repositories for research are available in the cognitive sciences (e.g., psychology, psychiatry, cognitive science, etc.)?


Ideally, it would be good to include:


a link to the repository
an overview of the size of the repository
the disciplinary content of the repository
whether there are restrictions on access and use
The ADNI project (2004–ongoing) aims at characterizing change in cognitive functions and brain structures with age, with a particular emphasis on Alzheimer's disease and neuroimaging.

From the website,


  The overall goal of this huge project is to define the rate of
  progress of mild cognitive impairment and Alzheimer's disease, to
  develop improved methods for clinical trials in this area, and to
  provide a large database which will improve design of treatment
  trials. We expect that this project will provide information and
  methods which will help lead to effective treatments for Alzheimer’s
  disease, leading to effective prevention.


Data that are collected include: demographics, clinical data, neuroimaging (MRI/PET) data, and a wide range of cognitive tests. (More on ADCS website.)
Details about protocols, available data can be found under ADNI Scientist's Home. In particular, data are available on ADCS. Please note that you must write an application to get the data (as is often the case).