ARC Smartphone App

What is ARC?

ARC stands for Ambulatory Research in Cognition which is a smartphone app used for testing cognition.

The ARC app administers very brief cognitive tests four times per day for one week. Each test session takes less than 3 minutes.

We follow three guiding principals:

Test often and everywhere.
Keep it short.
Combine the results.

Are you interested in using ARC?

Although the source code is written and available through GitHub, we cannot support other studies at this time due to limited staff bandwidth.

However, we are happy to consult on your project. Please contact PI Jason Hassenstab (hassenstabj@wustl.edu) or lab manager Sarah Stout (shstout@wustl.edu) for more information.

You can also check out our open code on GitHub here.

Test Parameters:

10 Price-Item pairs are presented per testing session.
Participants choose whether the price presented is a good price.
Next, they are given choices between two prices and tap the price that they remember seeing previously paired with that item.
The primary outcome is percent errors.

Test Parameters:

Participants see three tiles on top of the screen and two on the bottom of the screen.
They are asked “Which pair below matches one of the pairs on top?”
Participants complete 12 items as quickly as possible.
The primary outcome is the number correct and response time.

Test Parameters:

Participants see three items in random locations in a grid of boxes.
They are asked to remember where these are located.
Participants are then given a distraction task where they must find Fs in a sea of Es.
Finally they are asked to touch the boxes on a blank grid where they saw the original items.