26. The computer system of claim 23 , wherein the interactive feedback mechanism comprises an animated hand representative of the practice gesture perceived by the computer system together with one or more motion indications.
26. The computer system of claim 23 , wherein the interactive feedback mechanism comprises an animated hand representative of the practice gesture perceived by the computer system together with one or more motion indications. 29. The computer system of claim 26 , wherein the interactive feedback mechanism has superimposed thereon an animated display of an ideal gesture so that a difference between the practice gesture currently being performed and the ideal gesture can be perceived.