Extract Measured Behavior
Sensor data recorders can measure all kinds of conditions. Well known sensor recorder record heart rate, skin conductance and other physiological measures. Also, sound level meters and electronic temperature sensors can provide valuable information in any observational research study; either to support observed behavior or to extract behavioral conditions that are extremely hard to observe.
Challenge & Goal Summary
The biggest challenge we face here is:
- Synchronizing video and sensor data recorded by special physio recording devices.
The goal is:
- Watch all measured values in sync with the video(s).
- Observe the behavior of the participant in all situations in which the skin conductance and heart rate rises above a certain value.
That’s how you can do it
All material is recorded within a Mangold video lab setup, using Axis IP cameras and VideoSyncPro IP for the recording of al video material and sending a synchronization signal to your physio recording device the moment a recording is started.
Prepare Data Recording
Because the biggest challenge is synchronizing the results of the sensors with your video, it is important that our VideoSyncPro IP solution can send a signal to our physio recording device the exact moment a recording session is started.
VideoSyncPro offers various trigger signals, some requiring a special cable to the physio recorder, other relying on network communication or even Software running on the VideoSyncPro IP recorder. Which suits your situation depends on the physio device you are using. Any of the methods produce a marker signal inside your sensor data file, based on which the synchronized import can take place.
Reviewing the video(s) is easy, once opened in INTERACT – allowing you to add comments and log observations any way you need it. To review the sensor data in-sync with your video, you first need to import your data into DataView. For synchronization of data that was recorded with a VideoSyncPro IP based video lab, only the measured data starting from the marker signal is relevant. For other recordings, synchronizing is more tricky, but doable, if you know your data.
Once the data is imported correctly in DataView and playing in sync with the videos, you can speed-up your observations tremendously by using DataView’s ability to generate regular Events into your INTERACT document, based on the values measured with your physio sensors.
For example, detecting since when a person is getting nervous is rather hard to observe, but if skin conductance is measured, this value will rise instantly. Similar interesting are all sequences where the heartrate rises above a certain value, etc.
This is where the real value of the integration between INTERACT and DataView becomes apparent: You can select a channel, specify a value range or an ‘above’ or ‘beneath’ criteria to generate.
Your advantage with INTERACT
The biggest advantage of INTERACT is its ability to re-organize, rename and shuffle collected data, should you notice that your initial structure is not perfect to find the answers you are looking for.