CARWatchAn open-source framework for improving objective saliva sampling in the field.
CARWatch is an open-source framework for supporting saliva sampling field studies. It combines mobile applications for Android and iOS used during data collection with a web-based Study Manager.
The framework was originally developed as a single Android app for cortisol awakening response (CAR) research and has since been expanded into a broader cross-platform ecosystem for studies in which saliva samples are collected in the field.
The cortisol awakening response is a widely used marker in psychoneuroendocrine research, but its assessment is highly time-critical. Even short delays between awakening and sampling can systematically distort CAR estimates and contribute to inconsistent findings in field studies.
CARWatch was developed to support more objective recording of sample events outside the lab. Barcode scans document sample events with timestamps, automated reminders support protocol adherence, and QR codes transfer predefined study settings to the app.
The CARWatch ecosystem consists of the following components:
The current smartphone app for reminders, awakening reports, and barcode-based recording of sampling events. Available on Google Play.
An iOS version is under development to extend the same workflow to Apple devices.
A web-based study manager for study setup, generation of study materials, and processing of exported log files. Available online.
The typical workflow of using CARWatch is the following:
Selected entry points for publications, applications of CARWatch, and project resources.
Interested in using CARWatch in your own study or research project? Contact us at robert.richer@fau.de.