FAQ: How can I make a "difference" Heat Map?

[SR-SUPPORT]

You can make generate difference heat maps in Data Viewer with the following steps:

1. In the Inspector window, select the two groups or trials you want to compare.
   
2. Right-click on one of the selected items.
   
3. Choose Create Difference Fixation Map from the menu.
   

Important: The order in which you select the items determines the subtraction. The second item you select is subtracted from the first. Think of it as:
(First Selection) - (Second Selection)

   

The resulting map will show "positive" areas (more fixations in the first selection) and "negative" areas (more fixations in the second selection).

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Exporting Raw Heat Map Data
You can export the raw pixel data from any fixation map for more complex visualizations or statistical analysis in other software.

To enable this feature:

• In the Inspector window, go to the Preferences tab.
  
• Select Output / Analysis > Fixation Map.
  
• Check the box next to Export Heat Map Matrix.
  

This will generate a .TIF data file containing the raw fixation density values for each pixel in the map.