Online Platform.
The COSMOS-Web cognitive battery was self-administered by participants on their desktop or laptop computers. The battery was programmed and administered with the Inquisit-Web platform (Millisecond Software, Seattle, WA). Participants downloaded an Inquisit-Web client and the COSMOS-Web battery on their home computers, where the software was run locally to avoid web-based latency variability for reaction time measurements. Instructions for each task in the battery were shown prior to the task. After completion of the battery, participants’ performance data were automatically uploaded to Inquisit servers and downloaded locally for statistical analysis. A telephone helpline at Brigham and Women’s Hospital was provided to aid participants if they had any technical troubles running the battery.