2 T T E E C C H H N N I I C C A A L L S S P P E E C C I I F F I I C C A A T T I I O O N N S; Tobii X2-30 Eye Trackers; A A P P P P E E N N D D I I X X C C : : C C O O M M P P L L I I A A N N C C E E I I N N F F O O R R M M A A T T I I O O N N A A N N D D W W A A R R N N I I N N G G S - Tobii X2-30 Eye Tracker Compact Edition Product Description

2 Technical Specifications
The characteristics of an eye tracker can be described in terms of gaze accuracy and gaze precision. Accuracy describes the an-
gular average distance from the actual gaze point to the one measured by the eye tracker. Gaze precision describes the spatial
variation between successive samples collected when the subject fixates at a specific point on a stimuli. More information re-
garding the accuracy and precision measurements can be found in Appendix B: Accuracy and Precision Measurements . A glos-
sary can be found at Appendix A: Glossary .
2.1 Tobii X2–30 Eye Trackers
Table 2.1 Gaze Accuracy (Preliminary)
1
G G a a z z e e a a c c c c u u r r a a c c y y
At ideal conditions
At 25° gaze angle
At 30° gaze angle
At 35° gaze angle
At 1 lux
At 300 lux
At 600 lux
At 1000 lux
White stimuli background
1. Accuracy under ideal conditions is measured in the centre of the head movement box with the subject fixed in a chinrest. Data is collected immediately after calibration, in a controlled laboratory
environment with constant illumination, with 9 stimuli points at gaze angles of ≤18º.
A A c c c c u u r r a a c c y y a a t t i i d d e e a a l l c c o o n n d d i i t t i i o o n n s s — — X X 2 2 – – 3 3 0 0 C C o o m m p p a a c c t t E E d d i i t t i i o o n n ( ( P P r r e e l l i i m m i i n n a a r r y y ) )
A A c c c c u u r r a a c c y y a a t t v v a a r r y y i i n n g g d d i i s s t t a a n n c c e e s s — — X X 2 2 – – 3 3 0 0 C C o o m m p p a a c c t t E E d d i i t t i i o o n n ( ( P P r r e e l l i i m m i i n n a a r r y y ) )
Product Description v.1.0 - en-US
T T o o b b i i i i X X 2 2 - - 3 3 0 0 E E y y e e T T r r a a c c k k e e r r C C o o m m p p a a c c t t E E d d i i t t i i o o n n
( ( f f i i r r m m w w a a r r e e v v e e r r s s i i o o n n 0 0 . . 7 7 . . 3 3 ) )
B B i i n n o o c c u u l l a a r r M M o o n n o o c c u u l l a a r r
0.4 0.5
0.5 0.6
0.5 0.6
N/A N/A
Pending Pending
0.4 0.5
Pending Pending
Pending Pending
Pending Pending
T T o o b b i i i i X X 2 2 - - 3 3 0 0 E E y y e e T T r r a a c c k k e e r r W W i i d d e e E E d d i i t t i i o o n n
( ( f f i i r r m m w w a a r r e e v v e e r r s s i i o o n n — — p p e e n n d d i i n n g g ) )
B B i i n n o o c c u u l l a a r r M M o o n n o o c c u u l l a a r r
0.4 0.5
0.5 0.6
0.5 0.6
Pending Pending
Pending Pending
0.4 0.5
Pending Pending
Pending Pending
Pending Pending
2 Technical Specifications
3