Tobii Glasses Analysis Software – Quantitative Analysis

Table of Contents

1. Metrics (Areas Of Interest) #

Areas of Interest (AOIs) enable numerical/statistical analysis based on regions or objects of interest in your snapshot images. AOIs are drawn around objects in your snapshot that you would like to analyze further in third-party software such as SPSS, Matlab or Excel. AOIs can be of any shape. Once an AOI has been drawn onto a snapshot, and there is data mapped onto the snapshot, the data export output file will include data on whether the participant’s gaze point is inside or outside the AOI.

To draw AOIs on a Snapshot:

  1. Select AOI editor in the main menu and an AOI editor tab will open. You can have multiple AOI editor tabs open simultaneously, one for each snapshot.
  2. To draw an AOI, do one of the following:
    • To draw polygons: Select the Polygon tool and click where you want the AOI to start and then click wherever you want to add vertices. Close the shape by clicking on the first vertex.
    • To draw rectangles or ellipses: Select the Draw rectangle or Draw ellipse tool on the top, click and drag until the shape is the size you want. To make the shape a perfect square or circle, press and hold SHIFT while you drag to draw.

To name an AOI, do one of the following:

  • In the list of AOIs, double-click the previous AOI name and enter the new name.
  • In the AOI shape, double-click the name label and enter the new name.

To change the shape of an existing AOI:

  1. Make sure the AOI you want to edit is visible.
  2. On the toolbar, select the Select/Move Vertices tool.
  3. Drag the vertices to transform the AOI.

To change the size of an existing AOI:

  1. Make sure the AOI you want to resize is visible.
  2. On the toolbar, select the Select/Move AOI tool.
  3. Click the AOI that you want to resize. A rectangle with sizing handles in the corners appears around the selected AOI.
  4. To increase or decrease the size, click and drag one of the sizing handles. To maintain the object’s proportions, press and hold SHIFT while you drag the sizing handle. The size of a selected AOI can also be adjusted by modifying the width (W:) and height (H:) values in the property fields on the toolbar.

To move an existing AOI:

  1. Make sure the AOI you want to move is visible.
  2. On the toolbar, select the Select/Move AOI tool.
  3. Click the AOI that you want to move. A rectangle appears around the selected AOI.
  4. Drag the AOI to its new location. To constrain an AOI so that it moves only horizontally or vertically, press and hold SHIFT while you drag the object. The position of a selected AOI can also be adjusted by modifying the X: and Y: values in the property fields on the toolbar.

To export an image of the AOIs on the snapshot:

  1. Right click on the snapshot and the context menu opens.
  2. Click Export Image in the context menu. A Save As dialog box opens.
  3. In the Save As dialog box, locate an appropriate folder, enter a file name and click Save.

Export metrics

  1. Select the Metrics tab in the Dashboard Menu. A Metrics Export tab opens.
  2. Select the metrics you want to include in the exported Excel file.
  3. Click the Export button on the top right. A Windows File Manager dialog box opens.
  4. In the file manager dialog box, locate the folder you want to save the file in.
  5. In the File name field, enter a file name for your file.
  6. Click Save to save the export file (named *.xlsx).

2. Eye tracking data #

From the Data Export tab, you can export all the raw data collected by the eye tracker as well as all data generated by the user, such as events that have been logged in the recordings. Exports from Data Export are saved in a tab-separated-values file (.tsv) and follows the Unicode standard.

With these data sets, you can e.g. quantify the logged events and identify outlying participants in the data. When you select Recording Timestamp and Event, you can see precisely when a certain event took place in the experiment.

To export data:

  1. Select Data Export in the Dashboard Menu. A Data Export tab opens.
  2. Select the data types you want to include in the .tsv file.
  3. Click the Export button on the top right. A Windows File Manager dialog box opens.
  4. In the file manager dialog box, locate the folder you want to save the file in.
  5. In the File name field, enter a file name for your file.
  6. Click Save to save the export file (named *.tsv).

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