Blind Sailors’ Spatial Representation Using an On-Board Force Feedback Arm: Two Case Studies

Table 1

Verbal reports of participants 1 and 2.

	Ego +	Ego −	Allo +	Allo −
Participant 1	“I can use it like a white cane”	“I’m following the next waypoint but I feel lost”	“Ok, I found the waypoint back”	“I need to follow the ship for a long time to perceive the heading”
		“I have no idea of the trajectory I did on the map”
Participant 2	“It’s intuitive: ahead is in front of me”	“I need to concentrate a lot to remember the initial layout”	“here, I remember the map”	“It was hard to identify the heading.”