Behavioral studies are mostly focused on measuring overt behavior, related to experimental variables. To get insight in the inner state of your test participants, we offer several Data AcQuisition (DAQ) systems to work in conjunction with The Observer^® XT. You can make synchronous recordings of physiological data, video, and behavior. This allows you to carefully study the interaction between external events, physiological responses, and the resulting behavior.

• Measure the internal state of your test participant.
• Study the interplay of external events, physiology, and behavior.

The inner world
Your test participant may appear to be calm, while hiding considerable stress. Use our DAQ systems to measure his physiological state. It can give you essential information in understanding his or her overt behavior. You might find that your test participant is tense due to environmental variables, such as the behavior of another person, or the difficulties in the software the participant uses.

For any type of research
Our DAQ systems enable you to study almost any research topic involving emotions, or mental and physical load. We help you to build the right solution, consisting of a DAQ system and The Observer XT. Since The Observer XT is set up to work with a broad range of equipment from several suppliers, we can even offer a wide range of DAQ devices.

Equipment
We deliver the following units:

• Stationary data acquisition base unit, consisting of:
  - ECG module (heart activity)
  - EEG module (brain activity)
  - EMG module (muscle activity)
  - EOG module (horizontal eye movements)
  - GSR module (transpiration)
  - Respiration module (VO2 and Respiration Exchange Ratio)
  - Oxygen saturation module (non-invasive)
  - Heart beat module (non-invasive)
  - Blood pressure module (non-invasive)
  - High-level transducer
  - Input Signal Isolator
• Optical isolator
• Portable heart rate monitor

Preferred suppliers
We only work with world-class suppliers. Our preferred suppliers for DAQ devices are:

• Biopac Systems, Inc. 
• Polar Electric
• Mindware Technologies

Selected custom integrations
The Observer XT has previously also been integrated with:

• ADInstruments
• Becker Meditec
• Biosemi
• EGI
• TMS International
• VU-AMS
• Gtec

Note: other brands and types of DAQ equipment can be delivered or integrated as custom solutions. See the custom solutions section or contact your sales representative.