Table 3.

The primitives of the lowest level of the user model extracted from the raw variables

Non-physiological		Physiological
User inputs	Game outputs	Eye tracker	Head pose
1. Average braking	6. No. of collisions	10. No. of blinks/s	17. CN of HP
2. Average throttle	7. Car XYZ position	11. Screen concentration	18. CC of HP
3. Average steering	8. Position and speed	12. CN of EG	19. CN of HP and VO
4. CN of user inputs	9. (Segment time)	13. CC of EG	20. CC of HP and VO
5. CC of user inputs		14. CN of EG and VO
		15. CC of EG and VO
		16. Eye fixations

CN cluster number, CC cluster centres, VO virtual orientation, EG eye gaze, HP head pose