Table 1.

Measurements and key results of this experiment.

Measure type	Variable name	Key results
Performance metrics	Rate of mutual gaze (objects identified/minute) Task completion time (seconds)	Head-gaze and Eye-gaze had more rate of mutual gaze than Baseline No significant difference
Observed behavior	Number of hand gestures Physical movement (meters) Distance between collaborators (meters)	Head-gaze and Eye-gaze needed less hand pointing than Baseline Head-gaze required least physical movement in the scene Eye-gaze condition had collaborators in closest proximity and Baseline had them most dispersed
Subjective surveys	Usability Social presence Semi-structured interview	Head-gaze was most easy to use and useful Baseline and FoV were more confusing than Head-gaze Baseline had least co-presence, others were similar FoV had worst attention allocation ratings and Eye-gaze was best Head-gaze had best perceived message understanding and perceived behavioral independence, baseline was worst in both Head-gaze preferred mostly AR users reported higher difficulty than VR users