Table 2.

Results of heuristic responses, noting the number of statements relevant to each item and the corresponding severity ratings.

Heuristic item	Severity rating				Total/item
	Severe	Annoying	Distracting	Inconvenient
Natural engagement	2	5	8	11		26
Compatibility with users’ task and domain	1	—a	3	5		9
Natural expression of action	2	3	15	11		31
Close coordination of action and representation	—	—	2	1		3
Realistic feedback	—	—	—	2		2
Faithful viewpoints	1	1	—	2		4
Navigation and orientation support	—	—	—	—		N/Ab
Clear entry and exit points	—	3	1	3		7
Consistent departures	—	-	1	1		2
Support for learning	1	2	3	5		11
Clear turn taking	—	—	—	—		N/A
Sense of presence	1	—	4	10		15

^aNot available.

^bN/A: not applicable.