Pengembangan Alat Pengukuran Kelelahan Mental Berbasis Uji Flicker
Abstract: Previous studies
have been conducted to measure fatigue using flicker test. However, the
validity of the device is still unknown empirically. This study proposed a
modification of fatigue measuring apparatus based on flicker test. The
modifications were developed from the framework of human factors product
design, with the stages including analysis of the existing condition,
operational concept, user requirements, performance criteria, system
requirements, design prototyping, usability testing and final testing. The
proposed apparatus consists of two main parts: a stimulus source and a control
device as input. The stimulus is given by three lights with adjustable position
and orientation angle. A LCD screen was provided to display status and result
of the measurement. The control device consists of three buttons to respond the
stimulus accordingly. Product testings were done through 1) a laboratory
experiment with activities of critical reading and arithmetic complex and 2) a
field study on a night bus driver. All the tasks selected represent works with
a dominant mental workload. The laboratory experiments showed the range of
Critical Flicker Fusion Frequency (CFFF) at work of 14-40 HZ, with the average
decline of CFFF values of 5.3 Hz in arithmetic complex and 4.8 Hz in critical
reading activities. The study on the night bus driver resulted in CFFF value
range of 18-40 Hz with the average delta CFFF of 8.97 Hz. Both testings suggest
that flicker test with CFFF indicators can be used to measure mental fatigue.
In addition, the proposed framework used in this design development can be used
as a reference in designing various products by taking human factor aspects as
the focus such as user needs and user limitations.
Penulis: Yassierli, Atya Nur
Aisha, Azi Ginanjar Nugraha
Kode Jurnal: jptindustridd160061