A real-time comparison between direct control, sequential pattern recognition control and simultaneous pattern recognition control using a Fitts’ law style assessment procedure

Table 6 Three-part questionnaire: Subjects were prompted to answer by rating from 1 (totally disagree) to 7 (totally agree) except where otherwise indicated

Part I
1.	I had enough practice to familiarize with the experiment.
2.	I could perceive a difference in difficulty with target distance from center.
3.	I could perceive a difference in difficulty with target width.
Part II
4.	I had enough practice to familiarize with today’s control strategy through VR and GUI practice trials.
5.	The strategy was intuitive to operate.
6.	I managed to stop the cursor movement whenever I wanted.
7.	The mental effort (cognitive burden) was: (rate from 0 (nonexistent) to 6 (highest possible))
8.	The muscle fatigue perceived at the session end was: (rate from 0 (nonexistent) to 6 (highest possible))
Part III
9.	As a strategy to control a myoelectric upper limb prosthesis I would choose: (DC, seqPR or simPR).
9.	Why?

ISSN: 1743-0003