EFFECTS OF SLEEP DEPRIVATION AND MONOTONOUS WORKING CONDITIONS ON COGNITIVE AND PERFORMANCE ASPECTS: A TRAIN SIMULATOR STUDY

• Main Author: AMALIA NIM : 23416063, WAHYUNI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31535
• Institution: Institut Teknologi Bandung

Driving is a monotonous job. Monotonous working conditions are known can cause fatigue, drowsiness and decreased motivation. In addition to monotonous, driving performance can be affected by sleep deprivation. At this time, research related to the effects of monotonous and sleep deprivation in the rail transport sector is still very rare coupled with no size indicating how much effect of sleep deprivation and monotonous conditions can decrease the performance of railway drivers. This study aims to evaluate the effect of sleep deprivation conditions, especially on monotonous driving conditions of cognitive and performance aspects. 24 participants were required to drive a rail simulator for 240 minute on monotonous and dynamic routes under normal sleep conditions and sleep deprivation. Cognitive and performance aspects are measured through objective measurements such as Psychomotor Vigilance Task (PVT) and Sustained Attention Test (SAT). Based on the analysis using mixed model of ANOVA 2 x 2, mean reaction times, number of lapses, 10% fastest and number of missed targets showed the effect of sleep deprivation on reaction speed. Sleep deprivation significantly affects performance degradation 2 times greater. On a monotonous driving route, the effect of sleep deprivation can decrease the performance by 75%. The reaction rate showed a 2.9%-39% decrease caused by sleep deprivation. Lack of sleep also increases sleepiness and fatigue in 20-40 minutes of driving. KSS and VAS scores showed an increase in drowsiness and fatigue by 39.4% and 43% in sleep deprivation conditions. From this study it can be concluded that sleep deprivation can decrease performance 4 times greater in monotonous conditions in line with the increasing number of speed violations with fatigue level at moderate level.