Blickshift Analytics: Advanced eye tracking analysis

Search for similar eye movements

Search for similar eye movements

One of the great challenges in analyzing eye tracking experiments is the search for similar eye movements. Most times, visual methods like the comparison of scan path pattern with scan path visualizations or the computation of different eye tracking metrics is used. These methods lead to misinterpretations of the eye tracking data or to superficial results.

Blickshift Analytics offers two unique solutions: With an automatic search process our software identifies typical eye movements on an AOI basis. You can set all search parameters individually. In addition to the automatic search, a sequence search gives you the possibility to search for exact defined scan path patterns. Using a similarity search, our software also finds eye movements, which are not exact similar with respect to fixation order, but are similar.

Elegant combination of quantitative and qualitative methods

Elegant combination of quantitative and qualitative methods

Basically, there are two methods for analyzing eye tracking data: hypotheses-based methods and explorative methods. Both have advantages and disadvantages and are used by scientists for different analysis tasks.

With Blickshift Analytics you can use both methods within one software application. Our software includes components for calculating all important eye tracking metrics as well as all necessary tools for an explorative, detailed analysis. All components are connected interactively with each other to provide you the best of the hypotheses-based and explorative approach for you.

Explorative analysis of eye movement behavior

Explorative analysis of eye movement behavior

In a first step, heat maps and scan path visualizations as well as statistical methods provide a good overview. However, the more detailed the analysis becomes, the more effort has to be invested for the analysis. In parallel, error rates increase due to possible errors during data exchange between different applications. In addition, the high dimensionality of recorded data with participants, stimuli and tasks has to be taken into account.

With Blickshift Analytics you can ensure the overview of your analysis in every moment. You can analyze your data step by step and increase continousely the level of detail of your results. Blickshift Analytics is designed according to the Information Seeking Mantra: At first, you get an overview about your data. Next, you filter all relevant information for your analysis with respect to your research questions. Finally, you focus your analysis on the details. In every step, our software supports you with the necessary visualizations and automatic components.

Import of raw data from state of the art eye tracking devices

Import of raw data from state of the art eye tracking devices

Since the millenium, several companies have brought eye tracking devices to the market. Different types of eye trackers cover various requirements of users. However, there does not exist a standardized file format for exchanging eye tracking data. For this reason, every eye tracking researcher has to develop different software interfaces for the data exchange.

This is not necessary, if you are using Blickshift Analytics. An automatic heuristic detects the file format and imports all data correctly. In the advanced import mode you can manually set all import parameters.

Data export to standard tools for statistical analysis

Data export to standard tools for statistical analysis

Most times, there is an existing analysis workflow using classical data analysis software like MATLAB, R, SPSS and others. If a new software has to be integrated in a workflow, existing software has to be adapted or, in the worst case, has to be re-implemented.

We have reduced the effort for integrating Blickshift Analytics in an existing software environment to a minimum. At every moment of the analysis, you are able to export results of calculations and data sections in CSV files. Additionally, you can export bitmaps of visualizations or do an easy copy and paste via clipboard into presentation software.

Correlation analysis of sensor data

Correlation analysis of sensor data

In many eye tracking experiments not only eye movements have been recorded, but also biometric values like galvanic skin response or heart rate frequencies. Eye movements have to be interpreted together with these sensor channels. Further data sources are interaction logs (e. g. mouse paths on the screen) or other sensors in the experiment environment.

In Blickshift Analytics you can import all these data channels together. Next, you analyze all information together to find correlations between eye movements and physiological data and other sensors. Or, you can compare mouse paths and scan path with only a few steps in our software.

Heat maps and scan paths rethought

Heat maps and scan paths rethought

Every scientist knows heat maps and scan paths. Both visualization techniques have played a key role to spread eye tracking technology into many labs around the world. These visualizations are easy to understand. However, they have significant disadvantages with respect to their meaningfulness. On the one hand, different visualization parameters can lead to misinterpretations when reading heat maps. On the other hand, scan paths get visual-cluttered when they show more participants at once.

Of course, Blickshift Analytics also gives you the possibility to present your data with heat maps and scan paths. However, we have enhanced these two classical techniques with further visualization parameters and interactions. Further, we have closely connected them with all components within our software. Thereby, you get completely new powerful possibilities to still use these two classical visualizations in the future.

Höchste Effizienz bei Analyse von Studien in der realen Welt

Höchste Effizienz bei Analyse von Studien in der realen Welt

Eye-Tracking-Experimente in der realen Welt stellen eine der aufwendigsten Studiendesigns in der Erforschung der visuellen Wahrnehmung dar. Die Besonderheit, dass mit Head-Mounted-Systemen gearbeitet wird und jeder Proband zu unterschiedlichen Zeiten variierende Stimuli betrachtet hat, macht eine quantitativ vergleichbare Ermittlung von Besonderheiten im Blickverhalten sehr zeitaufwendig oder oft sogar gar nicht sinnvoll möglich.

Hier bietet Ihnen Blickshift Analytics verschiedene Lösungen an: Zum einen können Sie Videoaufnahmen der Head-Mounted-Systeme zusammen mit weiteren Szenenkameras für die Analyse verwenden. Direkte situationsabhängige Überblendungen von Scan-Paths und Heat-Maps in das Head-Mounted-Video geben Ihnen einen direkten Einblick in das Sehverhalten der Probanden. Liegen AOIs aufgrund einer manuellem Annotierung der Fixationen (ebenfalls direkt in Blickshift Analytics möglich) oder Ergebnisse aus Bilderkennungsverfahren vor, können Sie den vollen Funktionsumfang der Sequenzanalyse ebenfalls nutzen. So werden Experimente in der realen Welt genauso leicht analysierbar wie Experimente unter Laborbedingungen!

Development, validation and optimization of perception and cognition models

Development, validation and optimization of perception and cognition models

One research question in Perception and Cognitive Sciences is the modeling of human vision. Thereby, models are developed to predict fixations on given stimuli. One open research question was so far, how to evaluate simulated fixation paths and how to optimize models with a simple method.

Since one particular feature of Blickshift Analytics is to compare scan paths very efficiently, you can now easily compare your simulated eye movements with recordings from experiments. Our software supports you with different visualization techniques, sequence analysis components and calculation methods of eye tracking metrics. With a few mouse clicks, you can identify all relevant model parameters for a further optimization.

Efficient overview of your user experiment

Efficient overview about your user experiment

One of the great challenges in analyzing driver experiments is the data complexity. Besides eye movements, there is a lot of other sensor data from the car like steering wheel angles, pedal activities and information from distance sensors and object recognition systems. Additionally, there are log files about the interaction between drivers and the interieur and context information about the traffic situation.

With our solution Blickshift Analytics you can analyze this data with an previously unknown efficiency. You get an efficient overview about your data, you can find quickly relevant time sections and identify participants with a similiar eye movement and driving behaviour. Analysis tasks, which required a time effort of days or weeks in the past, can now be done within a few hours!

Situation-based eye movement analysis

Situation-based eye movement analysis

Most times, second tasks are performed in driving experiments by the participants. A common analysis task is to identifiy common eye movment behaviors before an “event” during the second task. Or, a complete task block has to be analyzed in a high level of detail and has to be compared with other task blocks in the experiment.

With markings, an interactive section of data, you can analyze your data with respect to different conditions. For example, you can concentrate your analysis on the eye movement behavior before the drivers pass a crossing, which is labeled in the data. Interactively, you can test different time duration for marking the data. With automatic components you quickly compare the eye movements over many participants.

Parametrization of driver models

Parametrization of driver models

Driver models are the basis for advanced driver assistance systems (ADAS). A critical step during the development of driver models is to find optimal model parameters. For example, several fixations are required to perceive a pedestrian with a high probability. The exact number of fixations or an interval for the number of fixations is specified by driving experiments.

For the parametrization of driver models, you can use a combination of different visualizations and automatic components in Blickshift Analytics. However, the workflow is very simple: you only have to connect the necessary visualizations with the automatic components in Blickshift Analytics. Next, you interactively test the model parameters. Results are immediately shown in the visualizations.

Generation of training sets for AI development

Generation of training sets for AI development

A high number of AI algorithms are trained based on manual or semi-automatic generated training sets. In contrast to generating training sets based on images, the generation of training sets based on time dependent data is more complex. Since eye movements and sensor data belong to the class of time dependent data sets and state of the art tools were missing so far, generating training set for this kind of data required a high effort for a self-development.

For generating training sets Blickshift Analytics offers one of the most efficient solutions on the market. Again, the workflow is very simple: First, you select sections in the data and annotate these sections with labels. Second, you export these sections together with the assigned sensor and eye tracking data. Finally, you use this exported data as training sets. For generating training sets, you can choose out of two modi: You can manually select your data or you can use the support of Blickshift’s automatic components.