Ideal integration platform
The Observer XT
The Observer XT is the most complete software for behavioral research. Supporting you from coding behaviors on a timeline and unraveling the sequence of events to integrating different data modalities in a complete lab.
Why you should use The Observer XT
- Code behaviors in a quantitative way and visualize them on a timeline
- Automatically synchronize multiple data streams such as eye tracking, physiology, and emotions
- Calculate statistics and assess reliability








Trusted by researchers around the world

The Observer XT at the core of your lab
The Observer XT is the engine of your lab. Code behaviors accurately on a timeline, from one or multiple videos, include audio, integrate data modalities such as eye tracking or emotion data, and visualize and analyze your results all together. Would you like to learn more? Read the reasons why The Observer XT is the best software tool for a human behavior lab.

"The integration of FaceReader, The Observer XT, and psychophysiological data collection makes research programs possible at locations and within timetables that increase opportunity, quality, and efficiency."
Dr. C. Barton|Davidson College, USA
Data integration platform
Data synchronization is vital when studying time relationships. The Observer XT is especially designed to synchronously playback multiple modalities. Common modalities include video, screen captures, location data, physiological signals, eye tracking data, FaceReader™ data, and of course behavioral data. Use The Observer XT to get complete insight in behavior and physiology and take advantage of fully integrated equipment.

"The Observer is a crucial component of our research. It allows us to analyze data with the level of efficiency, detail, accuracy, and precision that's required for behavior analysis in psychological research."
Mrs. B. Gamber|University of Texas, USA
At the University of Mons The Observer XT is used to improve teacher practices
Marie Bocquillon of the University of Mons in Belgium explains all about her research. She records audio and video in order to code the behaviors of her future teachers in The Observer XT. Improving teacher practices is the ultimate goal.
Watch the video to learn more about why she chooses Noldus' tools.
Prof. Mercier explains that The Observer XT facilitates data integration in their lab
Prof. Julien Mercier from L'Université du Québec à Montréal, Canada is studying educational research. His lab is looking at refined brain information over time, involving the cognition and the affect of the learner. The Observer XT is used as integration platform.
Watch the video to learn more about why he chooses Noldus' tools.

Continue your research during COVID-19 pandemic
Due to the COVID-19 pandemic, many people are currently facing lab closures and have to work from home, trying to keep research projects going. Noldus wants to make the transfer to the home office of our customers as easy as possible, so that they can continue their video annotation and/or data analysis work remotely. Here's what we can do right now:
- If your lab has a site license of The Observer XT, you can access it via the IP address and port number provided to you by your IT department.
- It might be that you just weren’t able to collect your key before your lab was closed. For this purpose, Noldus Information Technology makes 1,000 remote-access licenses of The Observer XT available.
Relevant blogs

How to mark zebrafish without compromising their behavior
How to mark zebrafish without compromising their behavior? They may have just found the answer to this at the University of Toronto. Cheung et al. tried out a method using subcutaneous injection with dyes.
Horse training methods: The importance of behavioral analysis
In equitation sciences, there are at least two training strategies: the ‘natural’ way of horsemanship that allows the horse to evaluate action and reaction and horsemanship that is based on ‘overruling’ of the animal.