Page 148 - Kaleidoscope Academic Conference Proceedings 2024

2024 ITU Kaleidoscope Academic Conference

4.1.2 Concurrent Validity Testing

Kinovea is a free 2D motion analysis software known for its
capability to measure kinematic parameters. It is a reliable
tool that produces valid data, offering an acceptable level of
accuracy in angular and linear measurements obtained
through the digitization of x- and y-axis coordinates.
Participants are seated on a chair with back support in front
of a table adjusted to chest level, allowing freedom of

movement and compensatory adjustments if needed. A tilt
sensor-fitted glass is placed on the table within easy reach.
Figure 6: Reliability Testing with wooden quadriceps
board For normal individuals, a cardboard with marked lines
indicating various angles is placed on the table, while for
In static reliability testing, some wooden quadriceps board stroke survivors, two spherical markers are fixed in front of
capable of being positioned at 5 different angles is used as the glass, visible to the cameras. Water is filled in the glass
to the maximum capacity without spillage. Figure 7 shows
shown in Figure 6. The Tilt Sensor Device is placed over the
the goniometer setup for validity testing. Device attached to
wooden board at each of these angles, while goniometric
angle measurements were taken simultaneously. The tilt glass/mug used in the testing is shown in Figure 5. Figure 9
and Figure 10 shows the side view and top view setup
sensor angle values were then correlated with the
goniometric angle measurements. Intraclass correlation (ICC) scheme during concurrent validity testing.
was calculated between the actual angle readings and the
measurement angle from each trial. The obtained interclass
correlation coefficient (r) is 0.98. Eq. (1) and Eq. (2)
considered for statistical analysis during reliability and
concurrent validity testing of the device.

∑ ∑
∑
r = (1)

∑
∑

∑ ∑

ICC = (2)

Figure 9: Top view of setup for drinking activity

Figure 7: Reliability testing with Goniometer Setup

Figure 10: Side view of setup for drinking activity

Figure 8: Variation of Tilt angle with time in Tilt sensor
and Kinovea tool

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