Data Collection.md

This file explains the methodology of the data collection involved in the Gyronics Dataset. Additionally some basic statistics are also provided.

Methodology:

Participants were first informed upon the goals of the research their data was being collected for.

Next the data collecting procedure was explained to them. - They would complete each gesture 10 times. - The recorder would explicitly tell the participant when to begin each gesture. - If for any reason any gesture required re-collection participants would be expected to repeat the gesture after the recorded told them. - If the gesture was completed in a manner distinctly different from the nature of the gesture the recorder would ask the participant to redo the gesture and show an acceptable version of the gesture.

The participants then fastened the device to their forearm of choice. Care was taken to ensure a comfortable yet tight fit was established, so as to avoid noise artefacts as a result of slippage or inertial effects during movement.

The age, build, gender, and hand of choice of the participant was then recorded.

The participants would then perform each gesture a total of 10 times.

Prior to data collection, the gesture would be explained to the participant along with a visual demonstration of the gesture being made. Participants were explicitly guided to complete the gesture in a manner most comfortable to them.

If this "manner" would misrepresent the gesture the recorded would ask the participant to redo the gesture in an acceptable fashion. (i.e if the P gesture looked more like a circle gesture, the recorder would ask the participant to redo the gesture in a manner more clearly distinguishing the two gestures)

Data was collected from 50 individuals of which...

Right Handed: 46

Left Handed: 4

Male: 39

Female: 11

Age Range: 17-33

Notable Statistics:

Gesture Class Distribution:

Gesture	Value
swipe_down	450
circle_clk	450
p_shape	448
swipe_up	449
v_shape	450
s_shape	451
twist_right	452
circle_cclk	449
swipe_right	449
swipe_left	449

Mean and Standard Deviation of Duration

Sampling rate = 100 Hz

The following provides the mean sample time (with standard deviation) taken for each gesture type:

Gesture	Mean	Standard Deviation
swipe_down	500.55	306.86
circle_clk	559.21	224.43
p_shape	558.08	178.78
swipe_up	510.26	186.19
v_shape	530.73	264.24
s_shape	536.52	179.37
twist_right	465.02	164.36
circle_cclk	536.51	190.95
swipe_right	476.98	151.07
swipe_left	486.01	174.92

Gesture Consistency Scores (with Spearman)

All samples for each gesture type were aligned and compared to provide the following scores:

Swipe_down

Axis	Ax	Ay	Az	Gx	Gy	Gz	Roll	Pitch
Scores	0.56	0.91	0.64	0.85	0.68	0.77	0.91	0.67

Circle_clk

Axis	Ax	Ay	Az	Gx	Gy	Gz	Roll	Pitch
Scores	0.68	0.82	0.67	0.79	0.70	0.80	0.80	0.75

P_shape

Axis	Ax	Ay	Az	Gx	Gy	Gz	Roll	Pitch
Scores	0.70	0.86	0.72	0.84	0.78	0.81	0.89	0.83

Swipe_up

Axis	Ax	Ay	Az	Gx	Gy	Gz	Roll	Pitch
Scores	0.81	0.89	0.87	0.88	0.77	0.74	0.93	0.85

V_shape

Axis	Ax	Ay	Az	Gx	Gy	Gz	Roll	Pitch
Scores	0.78	0.83	0.67	0.78	0.74	0.74	0.82	0.80

S_shape

Axis	Ax	Ay	Az	Gx	Gy	Gz	Roll	Pitch
Scores	0.72	0.84	0.65	0.75	0.67	0.68	0.86	0.75

Twist_right

Axis	Ax	Ay	Az	Gx	Gy	Gz	Roll	Pitch
Scores	0.87	0.81	0.93	0.73	0.83	0.71	0.69	0.89

Circle_cclk

Axis	Ax	Ay	Az	Gx	Gy	Gz	Roll	Pitch
Scores	0.74	0.84	0.71	0.81	0.75	0.81	0.80	0.77

Swipe_right

Axis	Ax	Ay	Az	Gx	Gy	Gz	Roll	Pitch
Scores	0.80	0.73	0.66	0.74	0.69	0.90	0.81	0.81

Swipe_left

Axis	Ax	Ay	Az	Gx	Gy	Gz	Roll	Pitch
Scores	0.79	0.78	0.58	0.64	0.55	0.89	0.77	0.81