I'm writing a simple iPhone relaxation app and am thinking of a very quick test I can do to learn something about the user's level of stress, anxiety, etc. The objective is to measure how effective the app is or to adjust the length of the session.
I thought of using the following measurement process:
- Ask the user to trace a line with their finger, prior to relaxation
- Repeat the tracing process following relaxation
- Analyze and compare results to the user's previous entry or historic entries for the same user
Does this approach have any merit or validity? What other simple and quick ways are there to gauge how relaxed or stressed the user is?
A mobile device, like iPhone has 3 axis accelerometer, gyroscope, magnetometer, and a capacitive touchscreen that does not measure the pressure of a touch.