40
User
Manual
40
User
Manual
Manual Coding
Manual coding is a more qualitative data analysis method where you
create events at specified times to be able to calculate different statistics
(quantitative & qualitative) using statistical analysis software such as
Excel or SPSS, for example, to count durations spent on areas of interest,
compare behavior, use events to sum a number of actions (count), or
categorize qualitative data to find specific patterns or averages.
A) Setting the Coding Scheme
To set the Coding Scheme:
1. With Tobii Studio open to the appropriate glasses Project, click
Tools in the menu bar and then select Coding Scheme.
2. Click a row in the Description column and type the name of the
event (for example: Started Looking at Brand A, Stopped Looking
at Brand A, Selected Brand B).
3. Assign a Shortcut to each event by selecting the desired shortcut
from the drop-down list.
4. Enable Quick logging to prevent the New Log Message dialog
box from appearing when you push the shortcut in the Replay tab.
5. Double-click the respective color to open a color palette and
choose the color of the bookmark that is placed on the timeline.
6. Repeat steps 2-5 until you have created all your events, and then
click OK.
Read about Managing and logging events in the Tobii Studio User
Manual.
Be objective and clear when predetermining the criteria for an event. For
example, the event duration on a specific area begins with the first frame
the data point is on the specific area, and ends the first frame the data
point is outside the area.
Also, take into account the foveal vision size (1-2 degrees of visual angle)
and any inaccuracies in the data to determine the most probable fixation
point. If a data point is right next to a point of interest, it may still belong
to the event of looking at this specific point of interest.
Manual Coding in Tobii Studio
Before you can start with manual coding you will have to import
your recordings, set the participant variables and correct for any
parallax that may still be present since parallax offsets may cause a
false interpretation of the data!
Manual Coding consists of the following steps:
A) Setting the Coding Scheme
B) Coding
C) Exporting Event Data
D) Data analysis in an external statistical analysis program
Coding Scheme dialog box
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