Statistics
Tobii Studio provides a framework for quantitative analysis of eye tracking and mouse-click data. The new AOI tool which supports both static and dynamic stimuli, calculation of key eye tracking and click metrics, as well as versatile tables and charts help you to generate top line overviews of the data, carry out more detailed analysis and interpretation as well as display your results.
Eye tracking and click metrics
The embedded Statistics tool calculates eye tracking and mouse-click metrics, based on AOIs and AOI groups. View data in tables and charts to structure, overview and flexibly mine your data.
- Calculation of time to first fixation, fixation duration, fixation count, percentage fixated, time to first mouse click, time from first fixation to next mouse click, and many more metrics.
- Flexible configuration of tables allows you to organize and filter your data.
- Multi-metric tables and cross tabulation.
- Results can be displayed in the form of bar charts that can be copied and pasted directly into your report.
Areas of interest (AOIs)
- Definition of AOIs within your stimuli for statistical analysis of eye tracking metrics within specified time intervals.
- The new Dynamic AOI tool handles both static and dynamic (moving and transforming) AOIs within a broad range of stimuli, such as images, movies, scene camera videos, screen recording, web pages and web recording, and more.
- The shapes and behaviors of dynamic AOIs are defined in keyframes. In between keyframes, Tobii Studio interpolates the shape and position of the AOI.
- Grouping of AOIs allows for aggregation and comparison of data within and across stimuli and tests.
Export eye tracking data
- Export raw eye tracking data or filtered data for further statistical analysis.
- Data can be exported to a text file that can easily be imported into Excel, SPSS, MATLAB, and most other statistical software suites for further analysis and significance testing.
- Batch export multiple recordings or media, either into one single file or multiple separate files.
Fixation filters
Three adjustable fixation filter implementations (the ClearView Fixation Filter, the Tobii Fixation Filter and the I-VT Filter) are available for eye movement classifications. Users can also choose to use unprocessed (raw) gaze data with or without noise reduction and gap interpolation.
The I-VT Filter chain can be customized to better suit the particular study, improve performance of fixation classification from recordings using different eye trackers and compensate for different levels of noise. Data processing functions include:
- Noise reduction functions: Two low-pass filter implementations are available - a symmetric moving average filter and a moving median filter. The resulting data appears smoother than the raw data and allows for more accurate fixation classification of data in which high levels of noise are present.
- Gap interpolation function fills in data where valid data is missing.
- Remove short fixations function is available both in the I-VT and the Clearview filter and allows for removal of fixations with a shorter duration than a set threshold.
The I-VT Filter is based on the eyes´ angular velocity and operates on eye movement data rather than gaze point pixel locations. As a result, the data is independent of screen resolution, screen size and the distance between the eyes and the stimulus. This means that more of the data is classified correctly as fixations, saccades or unclassified.
> Tobii Studio Specification