Observation of the other subjects behaviour, we found that HyperMirror pointing was learned through the following four stages.
Stage-1: explaining in words (Fig.4-a)
Stage-2: pointing suitable for face-to-face situation (Fig.4-b)
Stage-3: understanding the failure by WISIWYS-ness (Fig.4-c,d,e)
Stage-4: development of HyperMirror pointing (Fig.4-f)
Most of users reached stage-4 and used the HyperMirror pointing in addition to