Comparative evaluation of two peripheral information systems using motion sickness subjective rating

Motion sickness (MS) mitigation devices have gained attention in the research related to automated vehicle (AV) driving. While different modalities have been proposed, the visual-related modality has shown promises as most activities inside the AV. In this study, we measured the level of MS experienced by the 38 participants using two visual-based prototypes when they underwent the automated driving test rides. Results indicated that participants experienced less MS when using P1 than P2

Level of motion sickness based on heart rate variability when reading inside a fully automated vehicle

This study investigates the level of experienced motion sickness when performing reading while being driven in fully automated driving under three different conditions. One condition was without any intervention while the other two conditions were with the visual (VPIS) and haptic (HPIS) peripheral information system. Both systems provided the upcoming navigational information in the lateral direction three seconds before the turning/cornering was done. It was hypothesized that with the peripheral information systems, the experienced motion sickness would be reduced compared to the condition where a peripheral information system was not present. Eighteen participants with severe motion sickness susceptibility were carefully chosen to undergo the conditions using an instrumented vehicle with the Wizard-of-Oz approach. The participants were required to read from a tablet during the whole 15-minutes of automated driving. Results from the heart rate variability (beats per minute, root means square of successive differences, and high-frequency component) indicated no statistically significant changes (p &lt; 0.05) in motion sickness found with the presence of HPIS and VPIS when performing reading when being driven in automated mode. However, results from this study were mixed and inconclusive, but overall findings indicated mild motion sickness was found in both VPIS and HPIS conditions.</p

Gaining Situation Awareness Through A Vibrotactile Display To Mitigate Motion Sickness In Fully-Automated Driving Cars

Many previous studies mention that passive drivers or passengers of fullyautomated driving cars have less awareness of the surrounding and more experience to motion sickness symptoms when engaging in non-driving tasks. This occurrence is especially magnified when riding in an urban area with lots of junctions and corners. The aim of the current study is to investigate the effects of peripheral information about upcoming manoeuvres through a vibrotactile display in increasing the fully-automated driving car passengers’ awareness of situations and mitigating their motion sickness level. Twenty participants took part in the experiment which used a Wizard of Oz method to simulate autonomous driving, and the experiment was conducted in an instrumented car on a real road environment. Objective and subjective measurements were gathered. The results show that the implementation of the vibrotactile display increased situation awareness but failed to reduce the motion sickness. This study concludes that in order to mitigate motion sickness inside a fully-automated driving car, more specific information need to be included in the peripheral information. In addition, a device that can actively help in controlling the posture movements should also be implemented in the vehicle

Measuring driving styles: A validation of the multidimensional driving style inventory,&quot;

ABSTRACT The aim of this study was to validate the stability of the different factors of the Multidimensional Driving Style Inventory (MDSI

Fundamental frequency and perceived prominence of accented syllables. II. nonfinal accents

An experiment is described addressing the question of whether two accented syllables in a phrase should have equal pitch maxima in order to be perceived as equally prominent, or whether the second accented syllable should have lower pitch. The latter alternative was found to apply to the last accented syllable in an utterance by Terken [‘‘Fundamental frequency and perceived prominence of accented syllables,’’ J. Acoust. Soc. Am. 89, 1768–1776 (1991)]. The current results show that the earlier findings also apply to nonfinal accented syllables, thereby ruling out an explanation in terms of final lowering. The results are discussed in relation to listeners’ expectation about the application of downstep