Sample= 79 Stroke= 2 Segment= 2 Pressure=213 Norm.Jerk=0.1 ... · Sample= 79 Stroke= 2 Segment= 2 Pressure=213 Norm.Jerk=0.1 Vert.Size=-0.5 LoopSurface=0.0 Site=NS User=EJW Date=22Jul11

MovAlyzeR Features (Extracted features)

• Trial, Segmentations, Strokes

1 11/14/2018

11.2

11.3

11.4

11.5

11.6

2.4 2.6 2.8 3.0 3.2

AFDYOAHLTC0101.TF Sample= 79 Stroke= 2 Segment= 2 Pressure=213 Norm.Jerk=0.1 Vert.Size=-0.5 LoopSurface=0.0

Site=NS User=EJW Date=22Jul11 19:58

y(c

m)

x(cm)

Segmentation 1

Segmentation 2

Segmentation 3

Trial 1

1a. Static (Shape) Features

11.20

11.25

11.30

11.35

11.40

11.45

11.50

11.55

2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2

AFDYOAHLTC0201.TF

Sample= 42 Stroke= 1 Segment= 1 Pressure=214 Norm.Jerk=0.2 Vert.Size=0.4 LoopSurface=0.0


y(c

m)

x(cm)

Ver

tica

l Sta

rt P

osi

tio

n

Ver

tica

l Siz

e

Horizontal Size

• Positions and sizes (cm)

Horizontal Start Position

2 11/14/2018

11.2

11.3

11.4

11.5

11.6

2.4 2.6 2.8 3.0 3.2



y(c

m)

x(cm)

1b. Static (Shape) Features

11.20

11.25

11.30

11.35

11.40

11.45

11.50

11.55

2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2

AFDYOAHLTC0201.TF



y(c

m)

x(cm)

• Slant (radians)*

• Relative Initial Slant (radians) during first 80 ms*

3 11/14/2018

* Radian = Arc length / Radius 1 radian = 57 degrees

1c. Static (Shape) Features

11.20

11.25

11.30

11.35

11.40

11.45

11.50

11.55

2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2

AFDYOAHLTC0201.TF



y(c

m)

x(cm)

• Straightness Error (cm)

= Average distance to minimum RMS distance line

4 11/14/2018

11.2

11.3

11.4

11.5

11.6

2.4 2.6 2.8 3.0 3.2

AFDYOAHLTC0101.TF

Sample= 80 Stroke= 2 Segment= 2 Pressure=218 Norm.Jerk=0.1 Vert.Size=-0.5 LoopSurface=0.0


y(c

m)

x(cm)

1d. Static (Shape) Features

• Loop surface between successive strokes (cm2)

5 11/14/2018

11.2

11.3

11.4

11.5

11.6

2.4 2.6 2.8 3.0 3.2



y(c

m)

x(cm)

11.2

11.3

11.4

11.5

11.6

0.0 0.1 0.2 0.3 0.4



y(c

m)

Time (s)

-4

-2

0

2

4

0.0 0.1 0.2 0.3 0.4



vy(c

m/s

)

Time (s)

Duration

Peak y Velocity

Start Time

6

2. Dynamic Features

11/14/2018

6

Y Position (cm)

Y Velocity (cm/s)

11.2

11.3

11.4

11.5

11.6

2.4 2.6 2.8 3.0 3.2



y(c

m)

x(cm)

11.2

11.3

11.4

11.5

11.6

0.0 0.1 0.2 0.3 0.4



y(c

m)

Time (s)

-4

-2

0

2

4

0.0 0.1 0.2 0.3 0.4



vy(c

m/s

)

Time (s)

-100

-50

0

50

0.0 0.1 0.2 0.3 0.4



ay(c

m/s

**2

)

Time (s)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.0 0.1 0.2 0.3 0.4



Y J

erk

(cm

/s3

)

Time (s)

Peak y Acceleration (=Largest absolute of pos. and neg. acceleration within 1 stroke)

Average Absolute y Jerk

7

2a. Dynamic Features

11/14/2018

7 Y Position (cm)

Y Velocity (cm/s)

Y Acceleration (cm/s2)

Y Jerk (cm/s3)

11.2

11.3

11.4

11.5

11.6

2.4 2.6 2.8 3.0 3.2



y(c

m)

x(cm)

0

50

100

150

200

250

300

0.0 0.1 0.2 0.3 0.4



z

Time (s)

20

40

60

80

100

0.0 0.1 0.2 0.3 0.4

AFDYOAHLTC0101.TF



Ab

so

lute

Je

rk (

cm

/s3

)

Time (s)

Ave. Pen Pressure*

Ave. Absolute Jerk (cm/s3)

8

2b. Dynamic Features

11/14/2018

8

* Unit is tablet’s pressure units

3a. Dysfluency Features

• Normalized jerk per Stroke =

{½ * ∫dt Jerk2(t) } * duration5 / size2

Units: s1 (cm1 / s -3)2 * s5 * cm-2 = Unit free

A maximally smooth, straight harmonic stroke yields 7.75 (=π3/22).

A perfectly circular, constant-velocity stroke yields 10.96 (=π3/21.5).

Jerk can also be defined in the y-direction only: yJerk.

9 11/14/2018

Teulings, H.L., Contreras-Vidal, J.L., Stelmach, G.E., and Adler, C.H. (1997). Coordination of fingers, wrist, and arm in Parkinsonian handwriting. Experimental Neurology, 146, 159-170.

3b. More Dysfluency Features

• Relative Time to Peak y Velocity

• Number of Peak Acceleration Points / Stroke

11

3c. Dysfluency Features

11/14/2018

11

11.2

11.3

11.4

11.5

11.6

2.4 2.6 2.8 3.0 3.2



y(c

m)

x(cm)

11.2

11.3

11.4

11.5

11.6

0.0 0.1 0.2 0.3 0.4



y(c

m)

Time (s)

-4

-2

0

2

4

0.0 0.1 0.2 0.3 0.4



vy(c

m/s

)

Time (s)

Relative Time To Peak y Velocity = Time to Peak / Duration

11 11/14/2018

11

Y Position (cm)

Y Velocity (cm/s)

Time To Peak

Duration

3b. More Dysfluency Features

Requires submovement analysis: Rightclick your experiment >Properties >Processing >Segmentation >Check:

Submovement analysis.

• Frequency of Secondary Submovements

• Relative Duration of Primary Submovement

• Relative Size of Primary Submovement

4. Additional Features

• Plug-ins (MovAlyzeR “External Apps”)

– Batch file, calling any executable

– Matlab script

13 11/14/2018

Documents

Sample= 79 Stroke= 2 Segment= 2 Pressure=213 Norm.Jerk=0.1 ... · Sample= 79 Stroke= 2 Segment= 2 Pressure=213 Norm.Jerk=0.1 Vert.Size=-0.5 LoopSurface=0.0 Site=NS User=EJW Date=22Jul11