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Behavioral Coding & Analysis

The Observer® XT is the professional and user-friendly software package for the collection, analysis, and presentation of observational data.

Why you should use it

  • Code and describe behavior in an accurate and quantitative way.
  • Automatically synchronize multiple data streams such as eye tracking, physiology, and emotions.
  • More than 20,000 professionals around the world are using The Observer XT.

Publications with Noldus

The Observer XT is used in over 13,500 publications. Get your free trial to try it out!

Behavioral coding software

The Observer XT is the professional human behavior research software. It supports the entire workflow of your project: synchronize, visualize, and analyze your observational data. Easily code behavior, start and stop recordings from The Observer XT, and automatically import video, audio, eye tracking, physiology, and emotions. You can benefit from our experience with different hardware set-ups ranging from video recording to interfacing with data acquisition systems, or synchronized starting of other programs or systems.

Designing a coding scheme made easy

Designing a coding scheme is a crucial step in behavioral research. The coding scheme is the actual measuring instrument. Choices made at this stage determine what you can do with your data at later stages.

  • Describe complex phenomena in few keystrokes. The coding scheme has a powerful syntax.
  • Coding, editing, and adding comments in Chinese, Russian, and Japanese characters is possible enabling.
  • Record social interactions, group processes, and other complex behaviors with a minimum of different codes, minimizing learning efforts and errors.
  • Add or change codes while observing.

Customer testimonial

"The Observer XT has helped me capture children's natural behavior in an unobtrusive manner and this has added value to the behavioral interpretations I could draw. This tool is best suited for observational research where subjects can be observed without their awareness, which adds to the authenticity of findings. It is easy to use and gives data that can well be statistically analyzed.”

Prof. Mayuri  |  Acharya NG Ranga Agricultural University, India

Marie Bocquillon: "It is important to train future teachers."

Marie Bocquillon of the University of Mons in Belgium uses Noldus' behavioral analysis software for her research about improving teacher practices. Watch the movie to find out why Marie thinks that future teachers should look critically at their own performances.

Video analysis tool

The Observer XT offers you sophisticated data selection, clear visualization of data, powerful data analysis, and many export and import functions. The analysis of data often begins with visualizing data streams. All data streams are displayed alongside and play in perfect sync. Visualization creates a direct reference between video, audio, and other data: a great tool for quality improvement.

But there is more! With drag and drop, you can easily build filters based on combinations of independent variables, behaviors, physiological data, and time criteria, such as behaviors being active, or select subjects by independent variable. You can also perform a lag sequential analysis to analyze the order of events. Discover all the possibilities by trying it out for yourself!


The Observer XT at the core of your lab, offers you a completely integrated solution without missing any important data points. We’ve created a human behavior lab with our partners TobiiPro and Biopac, offering you all you need to collect, analyze, and present your research project.

Behavioral analysis software

Easy data integration

The Observer XT is an open system, allowing you to import event data from many different systems and to export data in XML format for use in other systems. The analytical powers of The Observer XT can easily be used on data from:

Behavioral coding with the Observer XT

Ready to kick start your research?

Want better insights and faster results? Contact us now to learn how we can help you!